Move movq(Register, ExternalReference) into X64 MacroAssembler

src/x64/assembler-x64.cc

Index: src/x64/assembler-x64.cc
diff --git a/src/x64/assembler-x64.cc b/src/x64/assembler-x64.cc
index 1502d7934098272debb7f7f9e8c6701bbeeba68a..d8d8e898d8db210b4fcc4ea542699c9b118c33f6 100644
--- a/src/x64/assembler-x64.cc
+++ b/src/x64/assembler-x64.cc
@@ -1481,12 +1481,6 @@ void Assembler::movq(Register dst, int64_t value, RelocInfo::Mode rmode) {
 }
 
 
-void Assembler::movq(Register dst, ExternalReference ref) {
-  Address value = reinterpret_cast<Address>(ref.address());
-  movq(dst, value, RelocInfo::EXTERNAL_REFERENCE);
-}
-
-
 void Assembler::movq(const Operand& dst, Immediate value) {
   EnsureSpace ensure_space(this);
   emit_rex_64(dst);