[wasm][liftoff] Remove dead macros

The macros were probably duplicated when splitting off
liftoff-assembler.cc from liftoff-compiler.cc, but are dead now.

R=mstarzinger@chromium.org

Bug: v8:9810
Change-Id: I668ce598815c45cc690653b5a12d90ab44937204
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1888070Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Backes <clemensb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64631}

src/wasm/baseline/liftoff-assembler.cc

@@ -24,13 +24,6 @@ using VarState = LiftoffAssembler::VarState;
 
 namespace {
 
-#define __ asm_->
-
-#define TRACE(...)                                            \
-  do {                                                        \
-    if (FLAG_trace_liftoff) PrintF("[liftoff] " __VA_ARGS__); \
-  } while (false)
-
 class StackTransferRecipe {
   struct RegisterMove {
     LiftoffRegister src;
@@ -859,9 +852,6 @@ std::ostream& operator<<(std::ostream& os, VarState slot) {
   UNREACHABLE();
 }
 
-#undef __
-#undef TRACE
-
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8