Merge branch 'config-finder-isolated-cleanup' into 'master'

application: Remove stale docstring param for `.find_plugins()`

See merge request pycqa/flake8!399

src/flake8/main/application.py

@@ -143,9 +143,6 @@ class Application(object):
         :param str config_file:
             The optional configuraiton file to override all other configuration
             files (i.e., the --config option).
-        :param bool ignore_config_files:
-            Determine whether to parse configuration files or not. (i.e., the
-            --isolated option).
         """
         local_plugins = config.get_local_plugins(config_finder, config_file)