Remove extra from getJavaType.

Bug: 32559427
Test: hidl_test_java

Change-Id: I1a96630eed1b61ab4ff2959ced2e83f94e8fb36d
diff --git a/Interface.h b/Interface.h
index 414516d..61981cc 100644
--- a/Interface.h
+++ b/Interface.h
@@ -67,8 +67,7 @@
             StorageMode mode,
             bool specifyNamespaces) const override;
 
-    std::string getJavaType(
-            std::string *extra, bool forInitializer) const override;
+    std::string getJavaType(bool forInitializer) const override;
 
     void emitReaderWriter(
             Formatter &out,