Revert of Expose SIMD.Float32x4 type to Javascript.

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index b8204b332f7cb97d143cd32e00cfbb18e37c5be8..2439e1b7f9b1b4c61e0f35a0c13caa779f1eb317 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -291,8 +291,6 @@
     __ Branch(slow, greater, t0, Operand(FIRST_SPEC_OBJECT_TYPE));
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ Branch(slow, eq, t0, Operand(SYMBOL_TYPE));
-    // Call runtime on identical SIMD values since we must throw a TypeError.
-    __ Branch(slow, eq, t0, Operand(FLOAT32X4_TYPE));
     if (is_strong(strength)) {
       // Call the runtime on anything that is converted in the semantics, since
       // we need to throw a TypeError. Smis have already been ruled out.
@@ -307,8 +305,6 @@
     __ Branch(slow, greater, t0, Operand(FIRST_SPEC_OBJECT_TYPE));
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ Branch(slow, eq, t0, Operand(SYMBOL_TYPE));
-    // Call runtime on identical SIMD values since we must throw a TypeError.
-    __ Branch(slow, eq, t0, Operand(FLOAT32X4_TYPE));
     if (is_strong(strength)) {
       // Call the runtime on anything that is converted in the semantics,
       // since we need to throw a TypeError. Smis and heap numbers have