[lldb] Remove unused swig macro (NFC) (#157905)

Author: kastiglione

lldb/bindings/python/python.swig

@@ -59,23 +59,6 @@ except ImportError:
 // Parameter types will be used in the autodoc string.
 %feature("autodoc", "1");
 
-%define ARRAYHELPER(type,name)
-%inline %{
-type *new_ ## name (int nitems) {
-   return (type *) malloc(sizeof(type)*nitems);
-}
-void delete_ ## name(type *t) {
-   free(t);
-}
-type name ## _get(type *t, int index) {
-   return t[index];
-}
-void name ## _set(type *t, int index, type val) {
-   t[index] = val;
-}
-%}
-%enddef
-
 %pythoncode%{
 import uuid
 import re