SONARJAVA-4904 S1301 Fix unused variable (#4722)

Author: leonardo-pilastri-sonarsource

java-checks/src/main/java/org/sonar/java/checks/SwitchAtLeastThreeCasesCheck.java

@@ -21,7 +21,6 @@
 
 import org.sonar.check.Rule;
 import org.sonar.plugins.java.api.IssuableSubscriptionVisitor;
-import org.sonar.plugins.java.api.JavaFileScannerContext;
 import org.sonar.plugins.java.api.tree.CaseGroupTree;
 import org.sonar.plugins.java.api.tree.SwitchStatementTree;
 import org.sonar.plugins.java.api.tree.Tree;
@@ -31,8 +30,6 @@
 @Rule(key = "S1301")
 public class SwitchAtLeastThreeCasesCheck extends IssuableSubscriptionVisitor {
 
-  private JavaFileScannerContext context;
-
   @Override
   public List<Tree.Kind> nodesToVisit() {
     return List.of(Tree.Kind.SWITCH_STATEMENT);