Delete the image_gradient_maps module.

PiperOrigin-RevId: 790496933

Author: llcourage

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
     strategy:
       matrix:
         node-version: [18]
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.11"]
     defaults:
       run:
         shell: bash -l {0}
@@ -46,7 +46,7 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
     - name: Upgrade pip
-      run: python -m pip install --upgrade pip==23.2
+      run: python -m pip install --upgrade pip==25.1.2
     - name: Install LIT package with testing dependencies
       run: python -m pip install -e '.[test]'
     - name: Debug dependency tree