Revert "Introduce intrinsics for double values in Javascript."

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 63f0533cd11395f14049e328174bd3c89e8c0b25..e7784259707cb1a046a8bf221d0ecc404bc131e5 100644
--- a/src/x64/assembler-x64.cc
+++ b/src/x64/assembler-x64.cc
@@ -2798,16 +2798,6 @@ void Assembler::movss(const Operand& src, XMMRegister dst) {
 }
 
 
-void Assembler::psllq(XMMRegister reg, byte imm8) {
-  EnsureSpace ensure_space(this);
-  emit(0x66);
-  emit(0x0F);
-  emit(0x73);
-  emit_sse_operand(rsi, reg);  // rsi == 6
-  emit(imm8);
-}
-
-
 void Assembler::cvttss2si(Register dst, const Operand& src) {
   EnsureSpace ensure_space(this);
   emit(0xF3);