msg: don't implement print_message for fmu-v2

This saves about 3.4k of flash for fmu-v2.

msg/tools/px_generate_uorb_topic_files.py

@@ -33,7 +33,7 @@
 #############################################################################
 
 """
-px_generate_uorb_topics.py
+px_generate_uorb_topic_files.py
 Generates c/cpp header/source files for uorb topics from .msg (ROS syntax)
 message files
 """
@@ -85,6 +85,8 @@ PACKAGE = 'px4'
 TOPICS_TOKEN = '# TOPICS '
 IDL_TEMPLATE_FILE = 'msg.idl.em'
 
+CONSTRAINED_FLASH = False
+
 
 class MsgScope:
     NONE = 0
@@ -156,7 +158,8 @@ def generate_output_from_file(format_idx, filename, outputdir, package, template
         "search_path": search_path,
         "msg_context": msg_context,
         "spec": spec,
-        "topics": topics
+        "topics": topics,
+        "constrained_flash": CONSTRAINED_FLASH
     }
 
     # Make sure output directory exists:
@@ -511,11 +514,15 @@ if __name__ == "__main__":
     parser.add_argument('-q', dest='quiet', default=False, action='store_true',
                         help='string added as prefix to the output file '
                         ' name when converting directories')
+    parser.add_argument('--constrained-flash', dest='constrained_flash', default=False, action='store_true',
+                        help='set to save flash space')
     args = parser.parse_args()
 
     if args.include_paths:
         append_to_include_path(args.include_paths, INCL_DEFAULT, args.package)
 
+    CONSTRAINED_FLASH = args.constrained_flash
+
     if args.headers:
         generate_idx = 0
     elif args.sources: