Fix "no matches for wildcard" error in env-setup.fish script. (#58345)

See https://github.com/ansible/ansible/pull/58345#discussion_r297288979

hacking/env-setup.fish

@@ -65,9 +65,10 @@ set -gx ANSIBLE_LIBRARY $ANSIBLE_HOME/library
 
 # Do the work in a fuction
 function gen_egg_info
-
-    if test -e $PREFIX_PYTHONPATH/ansible*.egg-info
-        rm -rf "$PREFIX_PYTHONPATH/ansible*.egg-info"
+    # 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
     end
 
     if [ $QUIET ]