Remove .gitignore from the Documentation subfolder
Remove .gitignore from the Documentation subfolder

The documentation is now built with buck and asiidoctor, and the
generated html files are output into ./buck-out/gen/Documentation
rather than ./Documentation.

The .gitignore file in ./Documentation was set up to ignore files
that used to be generated by asciidoc, and is no longer needed.

Change-Id: I0311f7ac52ff1f1220c8a8def93b10b9ec7dfc7e

GerritCodeReview/gerrit,Overruler/gerrit,thinkernel/gerrit,Seinlin/gerrit,gcoders/gerrit,hdost/gerrit,jackminicloud/test,midnightradio/gerrit,joshuawilson/merrit,dwhipstock/gerrit,thesamet/gerrit,TonyChai24/test,renchaorevee/gerrit,jackminicloud/test,gerrit-review/gerrit,TonyChai24/test,netroby/gerrit,bootstraponline-archive/gerrit-mirror,joshuawilson/merrit,gerrit-review/gerrit,bootstraponline-archive/gerrit-mirror,thinkernel/gerrit,thesamet/gerrit,TonyChai24/test,netroby/gerrit,pkdevbox/gerrit,gcoders/gerrit,MerritCR/merrit,Distrotech/gerrit,WANdisco/gerrit,hdost/gerrit,pkdevbox/gerrit,quyixia/gerrit,quyixia/gerrit,TonyChai24/test,renchaorevee/gerrit,Seinlin/gerrit,MerritCR/merrit,MerritCR/merrit,gcoders/gerrit,Distrotech/gerrit,Overruler/gerrit,quyixia/gerrit,quyixia/gerrit,qtproject/qtqa-gerrit,Overruler/gerrit,WANdisco/gerrit,Saulis/gerrit,gcoders/gerrit,dwhipstock/gerrit,GerritCodeReview/gerrit,supriyantomaftuh/gerrit,Team-OctOS/host_gerrit,jackminicloud/test,supriyantomaftuh/gerrit,MerritCR/merrit,netroby/gerrit,pkdevbox/gerrit,jackminicloud/test,Saulis/gerrit,joshuawilson/merrit,GerritCodeReview/gerrit,WANdisco/gerrit,qtproject/qtqa-gerrit,bpollack/gerrit,thesamet/gerrit,hdost/gerrit,gcoders/gerrit,pkdevbox/gerrit,qtproject/qtqa-gerrit,anminhsu/gerrit,renchaorevee/gerrit,joshuawilson/merrit,bootstraponline-archive/gerrit-mirror,thinkernel/gerrit,hdost/gerrit,Seinlin/gerrit,Saulis/gerrit,TonyChai24/test,Saulis/gerrit,dwhipstock/gerrit,dwhipstock/gerrit,Overruler/gerrit,gerrit-review/gerrit,Team-OctOS/host_gerrit,supriyantomaftuh/gerrit,MerritCR/merrit,gerrit-review/gerrit,renchaorevee/gerrit,Team-OctOS/host_gerrit,MerritCR/merrit,midnightradio/gerrit,Distrotech/gerrit,supriyantomaftuh/gerrit,supriyantomaftuh/gerrit,dwhipstock/gerrit,midnightradio/gerrit,thinkernel/gerrit,WANdisco/gerrit,anminhsu/gerrit,netroby/gerrit,qtproject/qtqa-gerrit,bootstraponline-archive/gerrit-mirror,Seinlin/gerrit,quyixia/gerrit,MerritCR/merrit,pkdevbox/gerrit,Distrotech/gerrit,jackminicloud/test,joshuawilson/merrit,Seinlin/gerrit,Saulis/gerrit,bpollack/gerrit,GerritCodeReview/gerrit,Distrotech/gerrit,supriyantomaftuh/gerrit,hdost/gerrit,Distrotech/gerrit,gcoders/gerrit,midnightradio/gerrit,Seinlin/gerrit,supriyantomaftuh/gerrit,GerritCodeReview/gerrit,bootstraponline-archive/gerrit-mirror,midnightradio/gerrit,midnightradio/gerrit,anminhsu/gerrit,WANdisco/gerrit,Team-OctOS/host_gerrit,thesamet/gerrit,joshuawilson/merrit,bootstraponline-archive/gerrit-mirror,hdost/gerrit,anminhsu/gerrit,qtproject/qtqa-gerrit,Saulis/gerrit,pkdevbox/gerrit,bpollack/gerrit,gcoders/gerrit,quyixia/gerrit,anminhsu/gerrit,dwhipstock/gerrit,thinkernel/gerrit,joshuawilson/merrit,GerritCodeReview/gerrit,GerritCodeReview/gerrit,hdost/gerrit,netroby/gerrit,joshuawilson/merrit,Team-OctOS/host_gerrit,gerrit-review/gerrit,TonyChai24/test,jackminicloud/test,Team-OctOS/host_gerrit,dwhipstock/gerrit,Distrotech/gerrit,quyixia/gerrit,renchaorevee/gerrit,thinkernel/gerrit,Seinlin/gerrit,Overruler/gerrit,gerrit-review/gerrit,thesamet/gerrit,anminhsu/gerrit,bpollack/gerrit,gerrit-review/gerrit,MerritCR/merrit,thinkernel/gerrit,renchaorevee/gerrit,Overruler/gerrit,bpollack/gerrit,jackminicloud/test,renchaorevee/gerrit,Team-OctOS/host_gerrit,thesamet/gerrit,qtproject/qtqa-gerrit,anminhsu/gerrit,TonyChai24/test,netroby/gerrit,pkdevbox/gerrit,netroby/gerrit,qtproject/qtqa-gerrit,GerritCodeReview/gerrit,thesamet/gerrit,bpollack/gerrit,WANdisco/gerrit,WANdisco/gerrit