Remove unused files

.coveragerc

@@ -1,21 +0,0 @@
-# Copyright (c) 2014-present PlatformIO <contact@platformio.org>
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#    http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-[report]
-# Regexes for lines to exclude from consideration
-exclude_lines =
-    pragma: no cover
-    def __repr__
-    raise AssertionError
-    raise NotImplementedError

.readthedocs.yml

@@ -1,12 +0,0 @@
-# See https://docs.readthedocs.io/en/stable/config-file/index.html
-
-version: 2
-
-sphinx:
-  configuration: docs/conf.py
-
-formats:
-  - pdf
-
-submodules:
-  include: all