loci: remove setup_from_add declarations

These functions were removed recently.
diff --git a/c_gen/c_code_gen.py b/c_gen/c_code_gen.py
index 10acf1f..02f63c7 100644
--- a/c_gen/c_code_gen.py
+++ b/c_gen/c_code_gen.py
@@ -394,7 +394,6 @@
 
     # gen_base_types(out)
 
-    gen_flow_add_setup_function_declarations(out)
     out.write("""
 /****************************************************************
  *
@@ -1081,86 +1080,6 @@
 
 """)
 
-def gen_flow_add_setup_function_declarations(out):
-    """
-    Add the declarations for functions that can be initialized
-    by a flow add.  These are defined external to LOXI.
-    """
-
-    out.write("""
-/****************************************************************
- * Functions for objects that can be initialized by a flow add message.
- * These are defined in a non-autogenerated file
- ****************************************************************/
-
-/**
- * @brief Set up a flow removed message from the original add
- * @param obj The flow removed message being updated
- * @param flow_add The flow_add message to use
- *
- * Initialize the following fields of obj to be identical
- * to what was originally on the wire from the flow_add object:
- *     match
- *     cookie
- *     priority
- *     idle_timeout
- *     hard_timeout
- *
- */
-
-extern int
-of_flow_removed_setup_from_flow_add(of_flow_removed_t *obj,
-                                    of_flow_add_t *flow_add);
-
-
-/**
- * @brief Set up the packet in match structure from the original add
- * @param obj The packet in message being updated
- * @param flow_add The flow_add message to use
- * @returns Indigo error code.  Does not return a version error if
- * the version does not require initializing obj.
- *
- * Initialize the match member of obj to be identical to what was originally
- * on the wire from the flow_add object.  If applicable, the table ID is also
- * initialized from the flow_add object.
- *
- * This API applies to 1.2 and later only.
- */
-
-extern int
-of_packet_in_setup_from_flow_add(of_packet_in_t *obj,
-                                 of_flow_add_t *flow_add);
-
-
-/**
- * @brief Set up the flow stats entry from the original add
- * @param obj The packet in message being updated
- * @param flow_add The flow_add message to use
- * @param effects Optional actions or instructions; see below.
- *
- * Initialize the following fields of obj to be identical
- * to what was originally on the wire from the flow_add object:
- *     match
- *     actions/instructions (effects)
- *     cookie
- *     priority
- *     idle_timeout
- *     hard_timeout
- *
- * Note that the actions/instructions of a flow may be modified by a
- * subsequent flow modify message.  To facilitate implementations,
- * the "effects" parameter is provided.  If effects is NULL, the
- * actions/instructions are taken from the flow_add message.
- * Otherwise, effects is coerced to the proper type (actions or
- * instructions) and used to init obj.
- */
-
-extern int
-of_flow_stats_entry_setup_from_flow_add(of_flow_stats_entry_t *obj,
-                                        of_flow_add_t *flow_add,
-                                        of_object_t *effects);
-""")
-
 ################################################################
 #
 # List accessor code generation