cleanup: remove unused functions

Bug: n/a
Test: aidl_unittests

Change-Id: I6673aa434ac775b8d00e4c02305c5547e8308b4e
diff --git a/parser.cpp b/parser.cpp
index c7fd61a..93770bb 100644
--- a/parser.cpp
+++ b/parser.cpp
@@ -51,7 +51,7 @@
     return nullptr;
   }
 
-  return parser.ParsedDocument();
+  return parser.document_;
 }
 
 void Parser::SetTypeParameters(AidlTypeSpecifier* type,