fix: remove unused macros (#20839)

tools/shell/src/shellArguments.c

@@ -20,18 +20,6 @@
 #include "shellInt.h"
 #include "version.h"
 
-#ifndef CUS_NAME
-char cusName[] = "TDengine";
-#endif
-
-#ifndef CUS_PROMPT
-char cusPrompt[] = "taos";
-#endif
-
-#ifndef CUS_EMAIL
-char cusEmail[] = "<support@taosdata.com>";
-#endif
-
 #if defined(CUS_NAME) || defined(CUS_PROMPT) || defined(CUS_EMAIL)
 #include "cus_name.h"
 #endif