Update dependabot config (#1469)

.github/dependabot.yml

@@ -5,29 +5,7 @@ updates:
     schedule:
       interval: daily
 
-  # only allow dependencies those are direcly described in the docs/requirements.txt file
-  # to prevent generating redundant PRs for the same dependency update.
-  - package-ecosystem: pip
-    directory: /docs
-    schedule:
-      interval: daily
-    allow:
-      - dependency-name: "opencv-python-headless"
-      - dependency-name: "*sphinx*"
-      - dependency-name: "jupyte*"
-      - dependency-name: "markupsafe"
-      - dependency-name: "nbconvert"
-      - dependency-name: "ipython"
-      - dependency-name: "myst-parser"
-      - dependency-name: "tensorflow"
-      - dependency-name: "pandoc"
-
   - package-ecosystem: pip
     directory: /
     schedule:
       interval: daily
-
-  - package-ecosystem: pip
-    directory: /tests
-    schedule:
-      interval: daily