UAVCAN_PACK_STRUCTS removed, was useless

libuavcan/dsdl_compiler/libuavcan_dsdl_compiler/data_type_template.tmpl

@@ -33,19 +33,11 @@ ${line}
 #undef ${a.name}
 % endfor
 
-#ifndef UAVCAN_PACK_STRUCTS
-# error UAVCAN_PACK_STRUCTS
-#endif
-
 % for nsc in t.cpp_namespace_components:
 namespace ${nsc}
 {
 % endfor
 
-#if UAVCAN_PACK_STRUCTS
-UAVCAN_PACKED_BEGIN
-#endif
-
 % if t.kind != t.KIND_SERVICE:
 template <int _tmpl>
 % endif
@@ -178,10 +170,6 @@ private:
 % endif
 };
 
-#if UAVCAN_PACK_STRUCTS
-UAVCAN_PACKED_END
-#endif
-
 /*
  * Out of line struct method definitions
  */