Remove unused struct_var_* functions.

These turned out to be unnecessary, so let's not keep them around
and let them start getting complicated.

Closes ticket 31630.

src/lib/confmgt/structvar.c

@@ -92,20 +92,6 @@ get_type_def(const struct_member_t *member)
   return lookup_type_def(member->type);
 }
 
-/**
- * (As typed_var_assign, but assign a value to the member of <b>object</b>
- * defined by <b>member</b>.)
- **/
-int
-struct_var_assign(void *object, const char *value, char **errmsg,
-                  const struct_member_t *member)
-{
-  void *p = struct_get_mptr(object, member);
-  const var_type_def_t *def = get_type_def(member);
-
-  return typed_var_assign(p, value, errmsg, def);
-}
-
 /**
  * (As typed_var_free, but free and clear the member of <b>object</b> defined
  * by <b>member</b>.)
@@ -119,19 +105,6 @@ struct_var_free(void *object, const struct_member_t *member)
   typed_var_free(p, def);
 }
 
-/**
- * (As typed_var_encode, but encode the member of <b>object</b> defined
- * by <b>member</b>.)
- **/
-char *
-struct_var_encode(const void *object, const struct_member_t *member)
-{
-  const void *p = struct_get_ptr(object, member);
-  const var_type_def_t *def = get_type_def(member);
-
-  return typed_var_encode(p, def);
-}
-
 /**
  * (As typed_var_copy, but copy from <b>src</b> to <b>dest</b> the member
  * defined by <b>member</b>.)

src/lib/confmgt/structvar.h

@@ -28,12 +28,8 @@ void *struct_get_mptr(void *object,
 const void *struct_get_ptr(const void *object,
                            const struct struct_member_t *member);
 
-int struct_var_assign(void *object, const char *value, char **errmsg,
-                      const struct struct_member_t *member);
 void struct_var_free(void *object,
                      const struct struct_member_t *member);
-char *struct_var_encode(const void *object,
-                        const struct struct_member_t *member);
 int struct_var_copy(void *dest, const void *src,
                     const struct struct_member_t *member);
 bool struct_var_eq(const void *a, const void *b,