simplify CI

.github/workflows/build_doc.yaml

@@ -3,16 +3,9 @@ name: Build documentation
 env:
   PR_NUMBER: ${{ github.event.number }}
 on:
-  pull_request:
-    branches:
-      - main
-      - develop
-    types: [closed, synchronize, opened]
   push:
     branches:
       - 'main'
-    tags:
-       - v*
   workflow_dispatch:
 
 
@@ -31,18 +24,6 @@ jobs:
         cd docs_build
         touch .nojekyll
     - name: Deploy Test Build
-      uses: JamesIves/github-pages-deploy-action@v4
-      with:
-        folder: docs_build
-        target-folder: Build_PR_${{ env.PR_NUMBER }}
-    - name: Deploy Build
-      if: ${{ github.ref_type == 'tag'}}
-      uses: JamesIves/github-pages-deploy-action@v4
-      with:
-        folder: docs_build
-        target-folder: ${{ github.ref_name }}
-    - name: Deploy Build
-      if: ${{ github.event.pull_request.merged }}
       uses: JamesIves/github-pages-deploy-action@v4
       with:
         folder: docs_build