Remove debug statement from GitHub workflow

The change removes a line used for debugging purposes from 'gradle.yml' in GitHub workflows. Debugging is generally not necessary in production and can be a security risk, especially when potentially sensitive environment variables are output.

.github/workflows/gradle.yml

@@ -10,8 +10,6 @@ jobs:
         with:
           distribution: 'temurin'
           java-version: 17
-      - name: Debug Environment Variables
-        run: echo "OPENWEATHERMAP_API_KEY=${{ vars.OPENWEATHERMAP_API_KEY }}"
       - uses: gradle/gradle-build-action@v2
         with:
           arguments: build