Revert of Expose SIMD.Float32x4 type to Javascript.

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index b45917e82ffda33a5ead6a9af4774f8105f7ee7e..c65b1ddbf33f21e267e768cc2546c09f8f5e98ba 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -2208,12 +2208,6 @@
         __ j(equal, instr->TrueLabel(chunk_));
       }
 
-      if (expected.Contains(ToBooleanStub::SIMD_VALUE)) {
-        // SIMD value -> true.
-        __ CmpInstanceType(map, FLOAT32X4_TYPE);
-        __ j(equal, instr->TrueLabel(chunk_));
-      }
-
       if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) {
         // heap number -> false iff +0, -0, or NaN.
         Label not_heap_number;
@@ -5717,11 +5711,6 @@
              Immediate(1 << Map::kIsUndetectable));
     final_branch_condition = zero;
 
-  } else if (String::Equals(type_name, factory->float32x4_string())) {
-    __ JumpIfSmi(input, false_label, false_distance);
-    __ CmpObjectType(input, FLOAT32X4_TYPE, input);
-    final_branch_condition = equal;
-
   } else {
     __ jmp(false_label, false_distance);
   }