Revert "[WebAssembly] Added default stack-only instruction mode for MC."

This reverts commit 917a99b71ce21c975be7bfbf66f4040f965d9f3c.

llvm-svn: 339630
diff --git a/llvm/test/CodeGen/WebAssembly/inline-asm-m.ll b/llvm/test/CodeGen/WebAssembly/inline-asm-m.ll
index ebd56ca..bee834e 100644
--- a/llvm/test/CodeGen/WebAssembly/inline-asm-m.ll
+++ b/llvm/test/CodeGen/WebAssembly/inline-asm-m.ll
@@ -1,4 +1,4 @@
-; RUN: not llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -wasm-register-codegen-test-mode -no-integrated-as
+; RUN: not llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals -no-integrated-as
 
 ; Test basic inline assembly "m" operands, which are unsupported. Pass
 ; -no-integrated-as since these aren't actually valid assembly syntax.