Revert "Java: Add a Java 8 compilation test to CI."

Can't compile with 1.8 because we do multi-version.

This reverts commit f7cd820.

Author: tasn

.github/workflows/java-lint.yml

@@ -20,21 +20,3 @@ jobs:
         run: |
           cd java
           ./gradlew build
-
-  java8-compile:
-    name: Java 8 Compile
-    runs-on: ubuntu-24.04
-
-    steps:
-      - uses: actions/checkout@v6
-
-      - name: Setup Java 8
-        uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: '8'
-
-      - name: Compile
-        run: |
-          cd java
-          ./gradlew compileJava compileTestJava