Misc cleanup
- Remove
Note [Existentials in shift_con_pat]
. The function shift_con_pat has been removed 15 years ago in 23f40f0e. - Remove
kcLookupTcTyCon
- it's the same astcLookupTcTyCon
- Remove ASSERT in
tyConAppArgN
. The functiongetNth
is the same as(!!)
except it checks exactly this assertion. - Remove unused function
nextRole