core: EnumVisitor: Do not remove ACC_ENUM access flag

This flag is necessary for class refresh, and should be left there.
Fixes disappearing of enum fields after class refresh.

jadx-core/src/main/java/jadx/core/dex/visitors/EnumVisitor.java

@@ -5,8 +5,6 @@ import java.util.List;
 
 import org.jetbrains.annotations.Nullable;
 
-import com.android.dx.rop.code.AccessFlags;
-
 import jadx.core.codegen.TypeGen;
 import jadx.core.deobf.NameMapper;
 import jadx.core.dex.attributes.AFlag;
@@ -47,8 +45,7 @@ public class EnumVisitor extends AbstractVisitor {
 		if (!convertToEnum(cls)) {
 			AccessInfo accessFlags = cls.getAccessFlags();
 			if (accessFlags.isEnum()) {
-				cls.setAccessFlags(accessFlags.remove(AccessFlags.ACC_ENUM));
-				cls.addAttr(AType.COMMENTS, "'enum' modifier removed");
+				cls.addAttr(AType.COMMENTS, "'enum' modifier should be removed");
 			}
 		}
 		return true;