Remove dockerhub-description workflow

.github/workflows/dockerhub-description.yml

@@ -1,19 +0,0 @@
-name: Update Docker Hub Description
-on:
-  push:
-    branches:
-      - master
-    paths:
-      - README.md
-      - .github/workflows/dockerhub-description.yml
-jobs:
-  dockerHubDescription:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v1
-    - name: Docker Hub Description
-      uses: peter-evans/dockerhub-description@v2.1.0
-      env:
-        DOCKERHUB_USERNAME: ${{ secrets.DOCKERHUB_USERNAME }}
-        DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
-        DOCKERHUB_REPOSITORY: peterevans/create-pull-request