Revert "renderRoI: Cache images of 1:1 scale when the plug-in doesn’t support"
Revert "renderRoI: Cache images of 1:1 scale when the plug-in doesn’t support"

This reverts commit 99fba52e89be7e166ffc80c4446183f869942a2a.

Endika/Natron,Endika/Natron,Endika/Natron