Revert "Merge pull request #96 from aerispaha/swig4.3-error-code-fix"

This reverts commit c85c40b, reversing
changes made to f71869a.

Author: Sam Hatchett

owa-epanet/wrapper/toolkit.i

@@ -24,39 +24,6 @@
 }
 
 /* TYPEMAP FOR IGNORING INT ERROR CODE RETURN VALUE */
-/*
-This is the same logic applied in swmm toolkit to handle a breaking change 
-introduced in the version 4.3 of SWIG. Credit: karosc
-
-See https://github.com/karosc/swmm-python/commit/1ef854ac469c1e2df29f9bb1ed718361df79cc95
-*/
-%header %{
-SWIGINTERN PyObject*
-Custom_SWIG_Python_AppendOutput(PyObject* result, PyObject* obj, int is_void) {
-    if (!result) {
-    result = obj;
-    } else if (result == Py_None) {
-    SWIG_Py_DECREF(result);
-    result = obj;
-    } else {
-    if (!PyList_Check(result)) {
-        PyObject *o2 = result;
-        result = PyList_New(1);
-        if (result) {
-        PyList_SET_ITEM(result, 0, o2);
-        } else {
-        SWIG_Py_DECREF(obj);
-        return o2;
-        }
-    }
-    PyList_Append(result,obj);
-    SWIG_Py_DECREF(obj);
-    }
-    return result;
-}
-#define SWIG_Python_AppendOutput Custom_SWIG_Python_AppendOutput
-%}
-
 %typemap(out) int {
     $result = Py_None;
     Py_INCREF($result);