Remove size optimization for individual modules

It makes more sense to set the optimization flags on a platform basis
instead of individually for each module. This allows for different
optimization options for SITL, NuttX, Snapdragon, etc.

src/modules/mavlink/CMakeLists.txt

@@ -36,7 +36,6 @@ px4_add_module(
 	STACK_MAIN 1200
 	STACK_MAX 1500
 	COMPILE_FLAGS
-		-Os
 	SRCS
 		mavlink.c
 		mavlink_main.cpp
@@ -53,4 +52,4 @@ px4_add_module(
 	DEPENDS
 		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix : 
+# vim: set noet ft=cmake fenc=utf-8 ff=unix :

src/modules/mavlink/mavlink_tests/CMakeLists.txt

@@ -36,7 +36,6 @@ px4_add_module(
 	STACK_MAIN 5000
 	COMPILE_FLAGS
 		-DMAVLINK_FTP_UNIT_TEST
-		-Os
 	SRCS
 		mavlink_tests.cpp
 		mavlink_ftp_test.cpp
@@ -46,4 +45,4 @@ px4_add_module(
 	DEPENDS
 		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix : 
+# vim: set noet ft=cmake fenc=utf-8 ff=unix :