RP@040: rework CMake for compiler warnings

examples/device/dfu_runtime/CMakeLists.txt

@@ -23,9 +23,6 @@ target_include_directories(${PROJECT} PUBLIC
         ${CMAKE_CURRENT_SOURCE_DIR}/src
         )
 
-# Example common such as compiler warnings
-include(${CMAKE_CURRENT_SOURCE_DIR}/../../example.cmake)
-
 # Configure compilation flags and libraries for the example... see the corresponding function
 # in hw/bsp/FAMILY/family.cmake for details.
 family_configure_device_example(${PROJECT})