SONARJAVA-4702 Remove unused imports (#4584)

Author: leonardo-pilastri-sonarsource

java-frontend/src/main/java/org/sonar/java/model/JUtils.java

@@ -23,11 +23,9 @@
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Objects;
-import java.util.Optional;
 import java.util.Set;
 import javax.annotation.Nullable;
 import org.eclipse.jdt.core.dom.ITypeBinding;
-import org.eclipse.jdt.core.dom.IVariableBinding;
 import org.eclipse.jdt.core.dom.Modifier;
 import org.sonar.plugins.java.api.semantic.Symbol;
 import org.sonar.plugins.java.api.semantic.SymbolMetadata;