comctl32/tests: Remove some dead code (Coverity).

dlls/comctl32/tests/button.c

@@ -164,17 +164,6 @@ static LRESULT WINAPI test_parent_wndproc(HWND hwnd, UINT message, WPARAM wParam
         message == WM_DRAWITEM || message == WM_COMMAND ||
         message == WM_IME_SETCONTEXT)
     {
-        switch (message)
-        {
-            /* ignore */
-            case WM_NCHITTEST:
-                return HTCLIENT;
-            case WM_SETCURSOR:
-            case WM_MOUSEMOVE:
-            case WM_NCMOUSEMOVE:
-                return 0;
-        }
-
         msg.message = message;
         msg.flags = sent|parent|wparam|lparam;
         if (defwndproc_counter) msg.flags |= defwinproc;