Don't handle PUBLIC/NONE separately
Don't handle PUBLIC/NONE separately

Since those role specifiers are checked in the grammar, there's no need
for the old checks to remain in place after 31eae6028ec.  Remove them.

Backpatch to 9.5.

Noted and patch by Jeevan Chalke

zeroae/postgres-xl,zeroae/postgres-xl,zeroae/postgres-xl,zeroae/postgres-xl,zeroae/postgres-xl