Remove SIMD.js from V8.

src/crankshaft/x64/lithium-codegen-x64.cc

Index: src/crankshaft/x64/lithium-codegen-x64.cc
diff --git a/src/crankshaft/x64/lithium-codegen-x64.cc b/src/crankshaft/x64/lithium-codegen-x64.cc
index 7b0443ebf92ca2c9782cdcc30280226b46624ac3..e520bf79b6b4aecdacc3db03c00f77558b1c7eaf 100644
--- a/src/crankshaft/x64/lithium-codegen-x64.cc
+++ b/src/crankshaft/x64/lithium-codegen-x64.cc
@@ -2065,12 +2065,6 @@ void LCodeGen::DoBranch(LBranch* instr) {
         __ j(equal, instr->TrueLabel(chunk_));
       }
 
-      if (expected & ToBooleanHint::kSimdValue) {
-        // SIMD value -> true.
-        __ CmpInstanceType(map, SIMD128_VALUE_TYPE);
-        __ j(equal, instr->TrueLabel(chunk_));
-      }
-
       if (expected & ToBooleanHint::kHeapNumber) {
         // heap number -> false iff +0, -0, or NaN.
         Label not_heap_number;
@@ -5195,17 +5189,6 @@ Condition LCodeGen::EmitTypeofIs(LTypeofIsAndBranch* instr, Register input) {
              Immediate((1 << Map::kIsCallable) | (1 << Map::kIsUndetectable)));
     final_branch_condition = zero;
 
-// clang-format off
-#define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type)       \
-  } else if (String::Equals(type_name, factory->type##_string())) { \
-    __ JumpIfSmi(input, false_label, false_distance);               \
-    __ CompareRoot(FieldOperand(input, HeapObject::kMapOffset),     \
-                   Heap::k##Type##MapRootIndex);                    \
-    final_branch_condition = equal;
-  SIMD128_TYPES(SIMD128_TYPE)
-#undef SIMD128_TYPE
-    // clang-format on
-
   } else {
     __ jmp(false_label, false_distance);
   }