user32/tests: Remove duplicated ok() call.

dlls/user32/tests/dde.c

@@ -2460,7 +2460,6 @@ static HDDEDATA CALLBACK server_end_to_end_callback(UINT uType, UINT uFmt, HCONV
         ok(!lstrcmpA(str, test_topic), "Expected %s, got %s, msg_index=%d\n",
                              test_topic, str, msg_index);
         ok(size == 12, "Expected 12, got %d, msg_index=%d\n", size, msg_index);
-        ok(size == 12, "Expected 12, got %d, msg_index=%d\n", size, msg_index);
 
         size = DdeGetData(hdata, NULL, 0, 0);
         ok((buffer = HeapAlloc(GetProcessHeap(), 0, size)) != NULL, "should not be null\n");