Do not set ANSIBLE_LIBRARY in env-setup.fish (#63688)

Setting this env var was removed from env-setup back in 2014. Not sure why it is in this setup script and it interferes with the defult search path

hacking/env-setup.fish

@@ -57,15 +57,13 @@ if not set -q PYTHON_BIN
     end
 end
 
-set -gx ANSIBLE_LIBRARY $ANSIBLE_HOME/library
-
 #
 # Generate egg_info so that pkg_resources works
 #
 
 # Do the work in a fuction
 function gen_egg_info
-    # Cannot use `test` on wildcards. 
+    # Cannot use `test` on wildcards.
     # @see https://github.com/fish-shell/fish-shell/issues/5960
     if count $PREFIX_PYTHONPATH/ansible*.egg-info > /dev/null
         rm -rf $PREFIX_PYTHONPATH/ansible*.egg-info