remove doc build from github

.github/workflows/deploy_doc.yml

@@ -1,22 +0,0 @@
-on:
-  push:
-    branches:
-      - gh_pages_deploy
-    paths:
-      - 'docs/**'
-      - 'mkdocs.yml'
-      - '.github/workflows/deploy_doc.yml'
-name: Deploy documentation
-jobs:
-  build:
-    name: Deploy documentation
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout master
-        uses: actions/checkout@v1
-
-      - name: Deploy docs
-        uses: mhausenblas/mkdocs-deploy-gh-pages@master
-        env:
-          PERSONAL_TOKEN: ${{ secrets.AUTOMATION_TOKEN }}
-          #CUSTOM_DOMAIN: optionaldomain.com