Move MethodInfo to CodeInfo.

There is no need to treat it specially any more,
because of the de-duplication at BitTable level.

This saves 0.6% of oat file size.

Test: test-art-host-gtest
Change-Id: Ife7927d736243879a41d6f325d49ebf6930a63f6
diff --git a/compiler/optimizing/code_generator.h b/compiler/optimizing/code_generator.h
index 59f858e..3d58d29 100644
--- a/compiler/optimizing/code_generator.h
+++ b/compiler/optimizing/code_generator.h
@@ -351,9 +351,8 @@
   void AddSlowPath(SlowPathCode* slow_path);
 
   void BuildStackMaps(MemoryRegion stack_map_region,
-                      MemoryRegion method_info_region,
                       const DexFile::CodeItem* code_item_for_osr_check);
-  void ComputeStackMapAndMethodInfoSize(size_t* stack_map_size, size_t* method_info_size);
+  void ComputeStackMapSize(size_t* stack_map_size);
   size_t GetNumberOfJitRoots() const;
 
   // Fills the `literals` array with literals collected during code generation.