Remove 'build plugins' job, since there is no plugin in this project

Author: sunye

.github/workflows/maven.yml

@@ -25,20 +25,6 @@ jobs:
       - name: Build with Maven
         run: mvn -B jacoco:prepare-agent install jacoco:report jacoco:report-aggregate --file pom.xml
 
-  build-plugins:
-    runs-on: ubuntu-latest
-    needs: build-bundles
-    steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 11
-        uses: actions/setup-java@v3
-        with:
-          java-version: '11'
-          distribution: 'temurin'
-          cache: maven
-      - name: Build plugins with Tycho
-        run: mvn -B  -f plugins/eclipse install
-
   deploy-bundles:
     runs-on: ubuntu-latest
     needs: build-bundles