[debug] remove StepFrame

src/wasm/wasm-debug.cc

Index: src/wasm/wasm-debug.cc
diff --git a/src/wasm/wasm-debug.cc b/src/wasm/wasm-debug.cc
index c4f4c29053e15a63de0f5d79be21bef9d71d7adf..34ee869d006f2ecd23fdb5d8a8233ba4770d495c 100644
--- a/src/wasm/wasm-debug.cc
+++ b/src/wasm/wasm-debug.cc
@@ -174,10 +174,6 @@ class InterpreterHandle {
                                   : WasmInterpreter::BreakFlag::AfterCall);
         return thread->Run();
       }
-      case StepFrame:
-        thread->AddBreakFlags(WasmInterpreter::BreakFlag::AfterCall |
-                              WasmInterpreter::BreakFlag::AfterReturn);
-        return thread->Run();
       default:
         UNREACHABLE();
         return WasmInterpreter::STOPPED;
@@ -233,9 +229,6 @@ class InterpreterHandle {
         hit_step = thread->GetFrameCount() == last_step_stack_depth_;
         break;
       }
-      case StepFrame:
-        hit_step = thread->GetFrameCount() != last_step_stack_depth_;
-        break;
       default:
         UNREACHABLE();
     }