Cleanup template headers

templates/skeletons/opengeode-structure/makefile.tmplt

-@@-- The following tags are available in this template:
-@@--
-@@-- @_Name_@                : The function name
-@@-- @_ASN1_Files_@          : List of all ASN.1 files
-@@-- @_ASN1_Modules_@        : List of all ASN.1 modules
-@@-- @_Is_Type_@             : Flag set to True for function type
-@@-- @_Instance_Of_@         : Name of function type if instance
-@@-- @_Is_Shared_Type_@      : True if the function type is in the shared library
-@@-- @_Shared_Lib_Dir_@      : Base folder containing the shared types
 # @_Language_@
 @@SET@@ SDL_Target_Language=""
 @@IF@@ @_Language_@ = Ada