Remove wxLog::AddTraceMask() call

This shouldn't be done unconditionally, trace mask can always be enabled
using WXTRACE environment variable from outside the test.

Also remove a useless tracing message.

tests/fswatcher/fswatchertest.cpp

@@ -378,8 +378,6 @@ class FileSystemWatcherTestCase
 public:
     FileSystemWatcherTestCase()
     {
-        wxLog::AddTraceMask(wxTRACE_FSWATCHER);
-
         // Before each test, remove the dir if it exists.
         // It would exist if the previous test run was aborted.
         wxString tmp = wxStandardPaths::Get().GetTempDir();
@@ -422,8 +420,6 @@ TEST_CASE_METHOD(FileSystemWatcherTestCase,
 
     EventTester tester;
 
-    wxLogTrace(wxTRACE_FSWATCHER, "TestEventCreate tester created()");
-
     tester.Run();
 }