Remove broken gating file
    
    Currently the gating file prevents building:
    
        rharwood@eesha:~/krb5.fedora/rawhide$ fedpkg build
        Could not execute build: Found a gating.yaml file in your repo with additional Greenwave policies, but it is not valid.
        Please fix the file or skip this check using the option --skip-remote-rules-validation.
        Error response from Greenwave: YAML Parser Error: mapping values are not allowed here
          in "<unicode string>", line 2, column 18:
               product_versions:
                                    ^
        rharwood@eesha:~/krb5.fedora/rawhide$
    
    Patches to add it back will be considered if and only if they don't
    break the build.