Keep only Java 21 test

Author: coudot

.github/workflows/maven.yml

@@ -15,36 +15,6 @@ on:
     branches: [ "master" ]
 
 jobs:
-  build_jdk11:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up JDK 11
-      uses: actions/setup-java@v4
-      with:
-        java-version: '11'
-        distribution: 'temurin'
-        cache: maven
-    - name: Build and test with JDK 11
-      run: mvn -B package --file pom.xml
-
-  build_jdk17:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up JDK 17
-      uses: actions/setup-java@v4
-      with:
-        java-version: '17'
-        distribution: 'temurin'
-        cache: maven
-    - name: Build and test with JDK 17
-      run: mvn -B package --file pom.xml
-
   build_jdk21:
 
     runs-on: ubuntu-latest