Rebased after #104439.

Author: slydiman

lldb/unittests/tools/lldb-server/tests/LLGSTest.cpp

@@ -14,10 +14,6 @@ using namespace llgs_tests;
 using namespace lldb_private;
 using namespace llvm;
 
-#ifdef SendMessage
-#undef SendMessage
-#endif
-
 // Disable this test on Windows as it appears to have a race condition
 // that causes lldb-server not to exit after the inferior hangs up.
 #if !defined(_WIN32)

lldb/unittests/tools/lldb-server/tests/TestClient.cpp

@@ -26,10 +26,6 @@ using namespace lldb_private;
 using namespace llvm;
 using namespace llgs_tests;
 
-#ifdef SendMessage
-#undef SendMessage
-#endif
-
 TestClient::TestClient(std::unique_ptr<Connection> Conn) {
   SetConnection(std::move(Conn));
   SetPacketTimeout(std::chrono::seconds(10));