Revert of Expose SIMD.Float32x4 type to Javascript.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index 9d004ca7a00c3812e68b92e0d5712268962a03e8..0781e47638871973377597a4cc34dcb9992ae3e5 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2181,14 +2181,6 @@
         __ Branch(instr->TrueLabel(chunk_), eq, scratch, Operand(SYMBOL_TYPE));
       }
 
-      if (expected.Contains(ToBooleanStub::SIMD_VALUE)) {
-        // SIMD value -> true.
-        const Register scratch = scratch1();
-        __ lbu(scratch, FieldMemOperand(map, Map::kInstanceTypeOffset));
-        __ Branch(instr->TrueLabel(chunk_), eq, scratch,
-                  Operand(FLOAT32X4_TYPE));
-      }
-
       if (expected.Contains(ToBooleanStub::HEAP_NUMBER)) {
         // heap number -> false iff +0, -0, or NaN.
         DoubleRegister dbl_scratch = double_scratch0();
@@ -5726,13 +5718,6 @@
     *cmp2 = Operand(zero_reg);
     final_branch_condition = eq;
 
-  } else if (String::Equals(type_name, factory->float32x4_string())) {
-    __ JumpIfSmi(input, false_label);
-    __ GetObjectType(input, input, scratch);
-    *cmp1 = scratch;
-    *cmp2 = Operand(FLOAT32X4_TYPE);
-    final_branch_condition = eq;
-
   } else {
     *cmp1 = at;
     *cmp2 = Operand(zero_reg);  // Set to valid regs, to avoid caller assertion.