fix: remove unused flag (#12093)

* [TD-14555]<impr>: remove plugins/mqtt

* [TD-14540]<impr>: taosdump code cleanup

* update taos-tools

* refine 5-taos-tools/taosdump/taosdumpTestInspect.py

* [TD-14540]<impr>: refine tools/taosdumpTest2.py

* remove a few unused checks

* update taos-tools

* debug tools/taosdumpTest2.py

* add more debug

* merge with develop

* remove all MQTT code

* remove all MQTT code

* remove debug from tests/pytest/tools/taosdumpTest2.py

* fix mac compile error

* remove mqttDebugFlag

* enh: remove mqtt plugin

remove mqtt from CMakelists.txt

[TD-14555]

* docs: remove mqttt paramters

[TD-14555]

* fix: remove unused MQTT flag

[TD-14555]

cmake/define.inc

@@ -17,10 +17,6 @@ IF (TD_USB_DONGLE)
   ADD_DEFINITIONS(-D_USB_DONGLE)
 ENDIF ()
 
-IF (TD_MQTT)
-  ADD_DEFINITIONS(-D_MQTT)
-ENDIF ()
-
 IF (TD_TSDB_PLUGINS)
   ADD_DEFINITIONS(-D_TSDB_PLUGINS)
 ENDIF ()