[compiler] Add relocatable pointer constants for wasm memory references.

src/x64/macro-assembler-x64.cc

Index: src/x64/macro-assembler-x64.cc
diff --git a/src/x64/macro-assembler-x64.cc b/src/x64/macro-assembler-x64.cc
index 5de65989fec5197f6e52b275695f6faf65a2bf70..2c4f02c9023adefcf6d26730015f0b58daf670a9 100644
--- a/src/x64/macro-assembler-x64.cc
+++ b/src/x64/macro-assembler-x64.cc
@@ -1116,15 +1116,6 @@ void MacroAssembler::Set(Register dst, int64_t x) {
   }
 }
 
-void MacroAssembler::Set(Register dst, int64_t x, RelocInfo::Mode rmode) {
-  if (rmode == RelocInfo::WASM_MEMORY_REFERENCE) {
-    DCHECK(x != 0);
-    movq(dst, x, rmode);
-  } else {
-    DCHECK(RelocInfo::IsNone(rmode));
-  }
-}
-
 void MacroAssembler::Set(const Operand& dst, intptr_t x) {
   if (kPointerSize == kInt64Size) {
     if (is_int32(x)) {