remove obsolete yapf config

.style.yapf

@@ -1,13 +0,0 @@
-# https://github.com/google/yapf#formatting-style
-# https://github.com/google/yapf/blob/master/yapf/yapflib/style.py
-
-[style]
-based_on_style = google
-# max-line-length = 119 from django, see: https://github.com/django/django/blob/master/setup.cfg
-BLANK_LINE_BEFORE_MODULE_DOCSTRING = True
-COLUMN_LIMIT = 119
-DEDENT_CLOSING_BRACKETS = True
-EACH_DICT_ENTRY_ON_SEPARATE_LINE = True
-SPLIT_BEFORE_DICT_SET_GENERATOR = False
-ALLOW_SPLIT_BEFORE_DICT_VALUE = False
-COALESCE_BRACKETS = True