Remove possibly nonexistent extension safely
Remove possibly nonexistent extension safely

Fixes #2900
mrinaldi/Paket,NatElkins/Paket,baronfel/Paket,inosik/Paket,sergey-tihon/Paket,cloudRoutine/Paket,cloudRoutine/Paket,vbfox/Paket,theimowski/Paket,cloudRoutine/Paket,isaacabraham/Paket,isaacabraham/Paket,sergey-tihon/Paket,thinkbeforecoding/Paket,isaacabraham/Paket,cloudRoutine/Paket,thinkbeforecoding/Paket,NatElkins/Paket,0x53A/Paket,isaacabraham/Paket,mrinaldi/Paket,baronfel/Paket,thinkbeforecoding/Paket,vbfox/Paket,mrinaldi/Paket,0x53A/Paket,vbfox/Paket,mrinaldi/Paket,theimowski/Paket,fsprojects/Paket,thinkbeforecoding/Paket,vbfox/Paket,fsprojects/Paket,jam40jeff/Paket,NatElkins/Paket,NatElkins/Paket,0x53A/Paket,jam40jeff/Paket,inosik/Paket,0x53A/Paket