[wasm] Drop unused variables in asm-types-unittest.

test/unittests/wasm/asm-types-unittest.cc

Index: test/unittests/wasm/asm-types-unittest.cc
diff --git a/test/unittests/wasm/asm-types-unittest.cc b/test/unittests/wasm/asm-types-unittest.cc
index 4b9096d17d061235902891f3ad1d45b8eba2a195..36493df86d06480b4c3e810cebfb21d3a3fe95c3 100644
--- a/test/unittests/wasm/asm-types-unittest.cc
+++ b/test/unittests/wasm/asm-types-unittest.cc
@@ -266,8 +266,8 @@ TEST_F(AsmTypeTest, IsExactly) {
 }
 
 bool FunctionsWithSameSignature(AsmType* a, AsmType* b) {
-  if (auto* func_a = a->AsFunctionType()) {
-    if (auto* func_b = b->AsFunctionType()) {
+  if (a->AsFunctionType()) {
+    if (b->AsFunctionType()) {
       return a->IsA(b);
     }
   }