Drop LuCI2 backend, it will move to its own repository

CMakeLists.txt

@@ -4,7 +4,6 @@ PROJECT(rpcd C)
 ADD_DEFINITIONS(-Os -Wall -Werror --std=gnu99 -g3 -Wmissing-declarations -Iinclude)
 
 OPTION(FILE_SUPPORT "File plugin support" ON)
-OPTION(LUCI2_SUPPORT "LuCI2 plugin support" ON)
 OPTION(IWINFO_SUPPORT "libiwinfo plugin support" ON)
 
 SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
@@ -28,13 +27,6 @@ IF(FILE_SUPPORT)
   SET_TARGET_PROPERTIES(file_plugin PROPERTIES OUTPUT_NAME file PREFIX "")
 ENDIF()
 
-IF(LUCI2_SUPPORT)
-  SET(PLUGINS ${PLUGINS} luci2_plugin)
-  ADD_LIBRARY(luci2_plugin MODULE luci2.c)
-  TARGET_LINK_LIBRARIES(luci2_plugin ubox ubus)
-  SET_TARGET_PROPERTIES(luci2_plugin PROPERTIES OUTPUT_NAME luci2 PREFIX "")
-ENDIF()
-
 IF (IWINFO_SUPPORT)
   SET(PLUGINS ${PLUGINS} iwinfo_plugin)
   ADD_LIBRARY(iwinfo_plugin MODULE iwinfo.c)