Merge branch 'bugfix/freemodbus_fix_supported_targets' into 'master'

freemodbus: fix supported targets ci issue

See merge request espressif/esp-idf!6823

examples/protocols/modbus/serial/mb_slave/CMakeLists.txt

@@ -5,7 +5,5 @@ set(SUPPORTED_TARGETS esp32)
 
 set(EXTRA_COMPONENT_DIRS $ENV{IDF_PATH}/examples/protocols/modbus/serial/common_components)
 
-set(SUPPORTED_TARGETS esp32)
-
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
 project(modbus_slave)