build: remove messages used for debugging

d6182fa introduced a target for checking include style, but also
added a message printing out the sources to be checked when running
cmake. this message is only used for debugging and is distracting.

so let's remove it.

Signed-off-by: Kefu Chai <kefu.chai@scylladb.com>

cmake/CheckIncludeStyle.cmake

@@ -7,7 +7,6 @@ find_package (Python3 COMPONENTS Interpreter)
 function (seastar_check_include_style target library)
   get_target_property (sources ${library} SOURCES)
   set (check-target "${target}-${library}")
-  message("${sources}")
   add_custom_target("${check-target}"
     COMMAND Python3::Interpreter ${CMAKE_CURRENT_LIST_DIR}/cmake/check-seastar-include-style.py ${sources}
     WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"