cmake remove unused/broken _no_optimization_for_target

cmake/px4_add_library.cmake

@@ -51,8 +51,5 @@ function(px4_add_library target)
 		target_link_libraries(${target} PRIVATE m nuttx_c)
 	endif()
 
-	# Pass variable to the parent px4_add_module.
-	set(_no_optimization_for_target ${_no_optimization_for_target} PARENT_SCOPE)
-
 	set_property(GLOBAL APPEND PROPERTY PX4_MODULE_PATHS ${CMAKE_CURRENT_SOURCE_DIR})
 endfunction()

cmake/px4_add_module.cmake

@@ -158,9 +158,6 @@ function(px4_add_module)
 		set_property(GLOBAL APPEND PROPERTY PX4_MODULE_PATHS ${CMAKE_CURRENT_SOURCE_DIR})
 	endif()
 
-	# Pass variable to the parent px4_add_module.
-	set(_no_optimization_for_target ${_no_optimization_for_target} PARENT_SCOPE)
-
 	# set defaults if not set
 	set(MAIN_DEFAULT MAIN-NOTFOUND)
 	set(STACK_MAIN_DEFAULT 2048)