Remove now redundant action

The wrapper validation is now done by default by setup-gradle.

Signed-off-by: thc202 <thc202@gmail.com>

Author: thc202

.github/workflows/ci.yml

@@ -19,7 +19,6 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: ${{ matrix.java }}
-      - uses: gradle/actions/setup-gradle@v4
       - run: ./gradlew assemble
       - run: ./gradlew check