Remove extra from getJavaType.

Bug: 32559427
Test: hidl_test_java

Change-Id: I1a96630eed1b61ab4ff2959ced2e83f94e8fb36d
diff --git a/EnumType.h b/EnumType.h
index 7fd3ea7..b03d328 100644
--- a/EnumType.h
+++ b/EnumType.h
@@ -45,8 +45,7 @@
     std::string getCppType(StorageMode mode,
                            bool specifyNamespaces) const override;
 
-    std::string getJavaType(
-            std::string *extra, bool forInitializer) const override;
+    std::string getJavaType(bool forInitializer) const override;
 
     std::string getJavaSuffix() const override;