MAINT: Remove buggy `PRE` version in setup.py

setup.py

@@ -53,7 +53,7 @@ MICRO = 0
 # https://github.com/pypa/packaging/pull/515
 # has made it into a release. Probably we should wait for pypa/packaging>=21.4
 # https://github.com/pypa/packaging/releases
-PRE = "dev" # "dev"  # e.g. rc0, alpha.1, 0.beta-23
+PRE = "" # "dev"  # e.g. rc0, alpha.1, 0.beta-23
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)