Remove rootDir from the markdown ext's tsconfig
Remove rootDir from the markdown ext's tsconfig

This was causing the output's folder structure to be based on the root of the
vscode project. This bring it in line with the other bundled extensions.

Fixes #15184

veeramarni/vscode,hoovercj/vscode,jchadwick/vscode,DustinCampbell/vscode,veeramarni/vscode,charlespierce/vscode,KattMingMing/vscode,gagangupt16/vscode,landonepps/vscode,hashhar/vscode,joaomoreno/vscode,rishii7/vscode,zyml/vscode,matthewshirley/vscode,DustinCampbell/vscode,Microsoft/vscode,veeramarni/vscode,0xmohit/vscode,zyml/vscode,matthewshirley/vscode,rishii7/vscode,KattMingMing/vscode,gagangupt16/vscode,joaomoreno/vscode,hashhar/vscode,gagangupt16/vscode,mjbvz/vscode,Microsoft/vscode,charlespierce/vscode,microsoft/vscode,veeramarni/vscode,matthewshirley/vscode,hungys/vscode,stringham/vscode,matthewshirley/vscode,hashhar/vscode,charlespierce/vscode,rishii7/vscode,landonepps/vscode,mjbvz/vscode,hungys/vscode,cleidigh/vscode,gagangupt16/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,hashhar/vscode,cleidigh/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,gagangupt16/vscode,Zalastax/vscode,mjbvz/vscode,0xmohit/vscode,hungys/vscode,microsoft/vscode,radshit/vscode,zyml/vscode,cra0zy/VSCode,hashhar/vscode,hungys/vscode,eamodio/vscode,Microsoft/vscode,gagangupt16/vscode,the-ress/vscode,jchadwick/vscode,the-ress/vscode,DustinCampbell/vscode,eamodio/vscode,rishii7/vscode,Krzysztof-Cieslak/vscode,zyml/vscode,hoovercj/vscode,zyml/vscode,cleidigh/vscode,eamodio/vscode,mjbvz/vscode,the-ress/vscode,microsoft/vscode,jchadwick/vscode,matthewshirley/vscode,landonepps/vscode,hungys/vscode,Krzysztof-Cieslak/vscode,the-ress/vscode,microlv/vscode,mjbvz/vscode,hashhar/vscode,radshit/vscode,hoovercj/vscode,DustinCampbell/vscode,hungys/vscode,radshit/vscode,the-ress/vscode,eamodio/vscode,jchadwick/vscode,veeramarni/vscode,Microsoft/vscode,hungys/vscode,mjbvz/vscode,veeramarni/vscode,joaomoreno/vscode,cleidigh/vscode,eamodio/vscode,eamodio/vscode,0xmohit/vscode,cleidigh/vscode,microlv/vscode,hashhar/vscode,charlespierce/vscode,DustinCampbell/vscode,jchadwick/vscode,joaomoreno/vscode,hoovercj/vscode,radshit/vscode,hashhar/vscode,jchadwick/vscode,hungys/vscode,microlv/vscode,the-ress/vscode,gagangupt16/vscode,hashhar/vscode,eamodio/vscode,mjbvz/vscode,mjbvz/vscode,0xmohit/vscode,0xmohit/vscode,KattMingMing/vscode,Microsoft/vscode,matthewshirley/vscode,0xmohit/vscode,zyml/vscode,Krzysztof-Cieslak/vscode,charlespierce/vscode,stringham/vscode,DustinCampbell/vscode,the-ress/vscode,gagangupt16/vscode,KattMingMing/vscode,microlv/vscode,microsoft/vscode,eamodio/vscode,landonepps/vscode,rishii7/vscode,charlespierce/vscode,gagangupt16/vscode,KattMingMing/vscode,hashhar/vscode,DustinCampbell/vscode,joaomoreno/vscode,jchadwick/vscode,charlespierce/vscode,zyml/vscode,hungys/vscode,landonepps/vscode,zyml/vscode,rishii7/vscode,microlv/vscode,hoovercj/vscode,charlespierce/vscode,Krzysztof-Cieslak/vscode,0xmohit/vscode,hungys/vscode,0xmohit/vscode,matthewshirley/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,hashhar/vscode,Microsoft/vscode,DustinCampbell/vscode,jchadwick/vscode,veeramarni/vscode,jchadwick/vscode,Zalastax/vscode,radshit/vscode,the-ress/vscode,rishii7/vscode,microlv/vscode,hashhar/vscode,Microsoft/vscode,Microsoft/vscode,gagangupt16/vscode,0xmohit/vscode,microsoft/vscode,eamodio/vscode,radshit/vscode,joaomoreno/vscode,0xmohit/vscode,radshit/vscode,eamodio/vscode,microlv/vscode,stringham/vscode,0xmohit/vscode,microlv/vscode,radshit/vscode,hoovercj/vscode,mjbvz/vscode,rishii7/vscode,charlespierce/vscode,zyml/vscode,charlespierce/vscode,Zalastax/vscode,radshit/vscode,veeramarni/vscode,matthewshirley/vscode,gagangupt16/vscode,charlespierce/vscode,jchadwick/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,matthewshirley/vscode,hungys/vscode,DustinCampbell/vscode,hashhar/vscode,hungys/vscode,Zalastax/vscode,microsoft/vscode,charlespierce/vscode,cleidigh/vscode,DustinCampbell/vscode,stringham/vscode,KattMingMing/vscode,joaomoreno/vscode,microsoft/vscode,radshit/vscode,zyml/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,joaomoreno/vscode,gagangupt16/vscode,hoovercj/vscode,Zalastax/vscode,rishii7/vscode,eamodio/vscode,KattMingMing/vscode,charlespierce/vscode,the-ress/vscode,joaomoreno/vscode,microsoft/vscode,matthewshirley/vscode,matthewshirley/vscode,the-ress/vscode,0xmohit/vscode,microlv/vscode,stringham/vscode,the-ress/vscode,radshit/vscode,mjbvz/vscode,microsoft/vscode,microlv/vscode,mjbvz/vscode,veeramarni/vscode,Krzysztof-Cieslak/vscode,the-ress/vscode,landonepps/vscode,cleidigh/vscode,mjbvz/vscode,KattMingMing/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Zalastax/vscode,hoovercj/vscode,microlv/vscode,zyml/vscode,Zalastax/vscode,hashhar/vscode,stringham/vscode,hoovercj/vscode,mjbvz/vscode,DustinCampbell/vscode,landonepps/vscode,the-ress/vscode,Krzysztof-Cieslak/vscode,hungys/vscode,cleidigh/vscode,hungys/vscode,landonepps/vscode,gagangupt16/vscode,jchadwick/vscode,mjbvz/vscode,the-ress/vscode,eamodio/vscode,microsoft/vscode,0xmohit/vscode,KattMingMing/vscode,joaomoreno/vscode,hoovercj/vscode,radshit/vscode,veeramarni/vscode,zyml/vscode,stringham/vscode,Krzysztof-Cieslak/vscode,hashhar/vscode,Krzysztof-Cieslak/vscode,stringham/vscode,KattMingMing/vscode,microsoft/vscode,hashhar/vscode,Zalastax/vscode,Microsoft/vscode,jchadwick/vscode,eamodio/vscode,hoovercj/vscode,charlespierce/vscode,stringham/vscode,Zalastax/vscode,charlespierce/vscode,cleidigh/vscode,Microsoft/vscode,0xmohit/vscode,zyml/vscode,landonepps/vscode,stringham/vscode,joaomoreno/vscode,Zalastax/vscode,KattMingMing/vscode,0xmohit/vscode,veeramarni/vscode,KattMingMing/vscode,DustinCampbell/vscode,hungys/vscode,landonepps/vscode,matthewshirley/vscode,landonepps/vscode,Zalastax/vscode,joaomoreno/vscode,veeramarni/vscode,landonepps/vscode,eamodio/vscode,radshit/vscode,KattMingMing/vscode,Zalastax/vscode,hungys/vscode,microsoft/vscode,microsoft/vscode,landonepps/vscode,stringham/vscode,veeramarni/vscode,radshit/vscode,gagangupt16/vscode,Krzysztof-Cieslak/vscode,microlv/vscode,microlv/vscode,microsoft/vscode,radshit/vscode,eamodio/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,KattMingMing/vscode,rkeithhill/VSCode,0xmohit/vscode,matthewshirley/vscode,cleidigh/vscode,hoovercj/vscode,Microsoft/vscode,zyml/vscode,landonepps/vscode,cleidigh/vscode,rishii7/vscode,stringham/vscode,Zalastax/vscode,hoovercj/vscode,Zalastax/vscode,the-ress/vscode,cleidigh/vscode,joaomoreno/vscode,cleidigh/vscode,gagangupt16/vscode,mjbvz/vscode,0xmohit/vscode,hoovercj/vscode,gagangupt16/vscode,veeramarni/vscode,radshit/vscode,the-ress/vscode,Microsoft/vscode,charlespierce/vscode,microlv/vscode,matthewshirley/vscode,stringham/vscode,mjbvz/vscode,veeramarni/vscode,landonepps/vscode,zyml/vscode,microlv/vscode,microlv/vscode,zyml/vscode,Microsoft/vscode,rishii7/vscode,DustinCampbell/vscode,cleidigh/vscode,joaomoreno/vscode,rishii7/vscode,eamodio/vscode,stringham/vscode,rishii7/vscode,Microsoft/vscode,hungys/vscode,microlv/vscode,mjbvz/vscode,hoovercj/vscode,DustinCampbell/vscode,hoovercj/vscode,zyml/vscode,radshit/vscode,joaomoreno/vscode,veeramarni/vscode,matthewshirley/vscode,rishii7/vscode,cleidigh/vscode,cleidigh/vscode,jchadwick/vscode,Krzysztof-Cieslak/vscode,rishii7/vscode,DustinCampbell/vscode,veeramarni/vscode,DustinCampbell/vscode,gagangupt16/vscode,KattMingMing/vscode,matthewshirley/vscode,KattMingMing/vscode,Microsoft/vscode,Zalastax/vscode,landonepps/vscode,joaomoreno/vscode,charlespierce/vscode,DustinCampbell/vscode,Zalastax/vscode,rishii7/vscode,Zalastax/vscode,cleidigh/vscode,landonepps/vscode,jchadwick/vscode,stringham/vscode,rishii7/vscode,KattMingMing/vscode,stringham/vscode,joaomoreno/vscode,matthewshirley/vscode,jchadwick/vscode,hoovercj/vscode,stringham/vscode,hashhar/vscode