[WASM] Eliminate SIMD boolean vector types.

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index 26cc85a81f693bde2b14bdb7fdf4f43e4aeb57e3..512b6d1775ad6df4b7eb859d6d5e71ceaa8e9628 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -263,27 +263,6 @@ class V8_EXPORT_PRIVATE InstructionSelector final {
   void MarkAsSimd128(Node* node) {
     MarkAsRepresentation(MachineRepresentation::kSimd128, node);
   }
-  void MarkAsSimd1x4(Node* node) {
-    if (kSimdMaskRegisters) {
-      MarkAsRepresentation(MachineRepresentation::kSimd1x4, node);
-    } else {
-      MarkAsSimd128(node);
-    }
-  }
-  void MarkAsSimd1x8(Node* node) {
-    if (kSimdMaskRegisters) {
-      MarkAsRepresentation(MachineRepresentation::kSimd1x8, node);
-    } else {
-      MarkAsSimd128(node);
-    }
-  }
-  void MarkAsSimd1x16(Node* node) {
-    if (kSimdMaskRegisters) {
-      MarkAsRepresentation(MachineRepresentation::kSimd1x16, node);
-    } else {
-      MarkAsSimd128(node);
-    }
-  }
   void MarkAsReference(Node* node) {
     MarkAsRepresentation(MachineRepresentation::kTagged, node);
   }