remove docs workflow

.github/workflows/deploy-docs.yml

@@ -1,22 +0,0 @@
-name: Deploy Docs
-on:
-  push:
-    branches:
-      - master
-
-defaults:
-  run:
-    working-directory: docs
-
-jobs:
-  deploy:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-python@v2
-        with:
-          python-version: 3.x
-      - run: pip install --upgrade pip
-      - run: pip install --upgrade setuptools wheel
-      - run: pip install mkdocs mkdocs-material pymdown-extensions
-      - run: mkdocs gh-deploy --force