Revert "e_exec - after an instance has its exe deleted - set exe to NULL"
Revert "e_exec - after an instance has its exe deleted - set exe to NULL"

This reverts commit 89fdebb9bf845de8bd1d97577c00206cd9ad9948.

CID 1132151

FlorentRevest/Enlightenment,rvandegrift/e,tasn/enlightenment,rvandegrift/e,rvandegrift/e,tasn/enlightenment,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,tasn/enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment