[compiler] Remove obsolete check for debug break slots.

This check whether a function is being debugged is obsolete. For the
optimization path it is covered by a bailout further down. The lookup
within the optimized code map doesn't need to be covered, because that
map is guaranteed to stay empty while break slots are present.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/1907923003

Cr-Commit-Position: refs/heads/master@{#35694}

src/compiler.cc

@@ -790,7 +790,6 @@ MaybeHandle<Code> GetOptimizedCode(Handle<JSFunction> function,
                                    JavaScriptFrame* osr_frame = nullptr) {
   Isolate* isolate = function->GetIsolate();
   Handle<SharedFunctionInfo> shared(function->shared(), isolate);
-  if (shared->HasDebugInfo()) return MaybeHandle<Code>();
 
   Handle<Code> cached_code;
   if (GetCodeFromOptimizedCodeMap(function, osr_ast_id)