Remove unused byte from Map::instance_sizes field.

src/mips/macro-assembler-mips.h

Index: src/mips/macro-assembler-mips.h
diff --git a/src/mips/macro-assembler-mips.h b/src/mips/macro-assembler-mips.h
index 22d12b430b19b7d6ee655e3d5d8f05bc0ab12f5a..39cd547373fb243049733cf6864eb935b948b6fc 100644
--- a/src/mips/macro-assembler-mips.h
+++ b/src/mips/macro-assembler-mips.h
@@ -509,13 +509,6 @@ class MacroAssembler: public Assembler {
                 Label* gc_required,
                 AllocationFlags flags);
 
-  // Undo allocation in new space. The object passed and objects allocated after
-  // it will no longer be allocated. The caller must make sure that no pointers
-  // are left to the object(s) no longer allocated as they would be invalid when
-  // allocation is undone.
-  void UndoAllocationInNewSpace(Register object, Register scratch);
-
-
   void AllocateTwoByteString(Register result,
                              Register length,
                              Register scratch1,