cli: Remove double check of rpmlintrc file

Remove the check of file existence for options.rpmlintrc, this is not needed
anymore, it's done by argparse with the "type=_is_file_path", that checks
that's the file exists and it's a regular file.

Author: danigm

rpmlint/cli.py

@@ -97,12 +97,6 @@ def process_lint_args(argv):
 
     options = parser.parse_args(args=argv)
 
-    # make sure rpmlintrc exists
-    if options.rpmlintrc and not all([rpmlintrc.exists()
-                                      for rpmlintrc
-                                      in options.rpmlintrc]):
-        print_warning(f"Not all user specified rpmlintrc '{options.rpmlintrc}' exist")
-        sys.exit(2)
     # validate all the rpmfile options to be either file or folder
     f_path = set()
     invalid_path = False