Revert of Use weak cells in map checks in polymorphic ICs.

src/mips64/macro-assembler-mips64.cc

Index: src/mips64/macro-assembler-mips64.cc
diff --git a/src/mips64/macro-assembler-mips64.cc b/src/mips64/macro-assembler-mips64.cc
index 3600e57e86326ccab03b0183f1fbd46f69f67d8e..8f0ae09088e495ee3e82319824be602cc6e6faca 100644
--- a/src/mips64/macro-assembler-mips64.cc
+++ b/src/mips64/macro-assembler-mips64.cc
@@ -3988,22 +3988,6 @@
 }
 
 
-void MacroAssembler::CmpWeakValue(Register match, Register value,
-                                  Handle<WeakCell> cell) {
-  li(match, Operand(cell));
-  ld(match, FieldMemOperand(match, WeakCell::kValueOffset));
-  Dsubu(match, value, match);
-}
-
-
-void MacroAssembler::LoadWeakValue(Register value, Handle<WeakCell> cell,
-                                   Label* miss) {
-  li(value, Operand(cell));
-  ld(value, FieldMemOperand(value, WeakCell::kValueOffset));
-  JumpIfNotSmi(value, miss);
-}
-
-
 void MacroAssembler::MovFromFloatResult(const DoubleRegister dst) {
   if (IsMipsSoftFloatABI) {
     Move(dst, v0, v1);