gdata: Remove extension, migrating it to a standalone repository (OpenRefine#6958)

Draft of the standalone repository is now at:
https://github.com/OpenRefine/refine-gdata-extension

Author: wetneb

.github/workflows/pull_request_e2e.yml

@@ -6,7 +6,6 @@ on:
       - 'main/IDEs/**'
       - 'main/webapp/modules/core/langs/**'
       - 'extensions/database/module/langs/**'
-      - 'extensions/gdata/module/langs/**'
       - 'extensions/pc-axis/module/langs/**'
       - 'extensions/phonetic/module/langs/**'
       - 'extensions/wikidata/module/langs/**'

.github/workflows/pull_request_server.yml

@@ -8,9 +8,6 @@ on:
       - 'extensions/database/src/**'
       - 'extensions/database/tests/**'
       - 'extensions/database/pom.xml'
-      - 'extensions/gdata/src/**'
-      - 'extensions/gdata/tests/**'
-      - 'extensions/gdata/pom.xml'
       - 'extensions/jython/src/**'
       - 'extensions/jython/tests/**'
       - 'extensions/jython/pom.xml'
@@ -145,17 +142,6 @@ jobs:
           fail-on-error: false
           parallel: true
 
-      - name: Coveralls gdata
-        uses: coverallsapp/github-action@v2
-        with:
-          base-path: extensions/gdata/src
-          files: extensions/gdata/target/site/jacoco/jacoco.xml
-          github-token: ${{ env.COVERALLS_TOKEN }}
-          format: jacoco
-          flag-name: Java-${{ matrix.java }}-gdata
-          fail-on-error: false
-          parallel: true
-
       - name: Coveralls wikibase
         uses: coverallsapp/github-action@v2
         with: