The removed st_nir_opts calls are mostly redundant.
There is an improvement with shader-db on radeonsi:
Before:
real 1m54.047s
user 28m37.857s
sys 0m7.573s
After:
real 1m52.012s
user 28m3.412s
sys 0m7.808s
Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>