Backport PR #57668 on branch 2.2.x (CLN: More numpy 2 stuff) (#57707)

Backport PR #57668: CLN: More numpy 2 stuff

Co-authored-by: Thomas Li <47963215+lithomas1@users.noreply.github.com>

Author: meeseeksmachine

pandas/_libs/src/vendored/ujson/python/objToJSON.c

@@ -74,7 +74,6 @@ typedef struct __NpyArrContext {
   npy_intp ndim;
   npy_intp index[NPY_MAXDIMS];
   int type_num;
-  PyArray_GetItemFunc *getitem;
 
   char **rowLabels;
   char **columnLabels;
@@ -405,7 +404,6 @@ static void NpyArr_iterBegin(JSOBJ _obj, JSONTypeContext *tc) {
   }
 
   npyarr->array = (PyObject *)obj;
-  npyarr->getitem = (PyArray_GetItemFunc *)PyArray_DESCR(obj)->f->getitem;
   npyarr->dataptr = PyArray_DATA(obj);
   npyarr->ndim = PyArray_NDIM(obj) - 1;
   npyarr->curdim = 0;
@@ -492,7 +490,7 @@ static int NpyArr_iterNextItem(JSOBJ obj, JSONTypeContext *tc) {
     ((PyObjectEncoder *)tc->encoder)->npyValue = npyarr->dataptr;
     ((PyObjectEncoder *)tc->encoder)->npyCtxtPassthru = npyarr;
   } else {
-    GET_TC(tc)->itemValue = npyarr->getitem(npyarr->dataptr, npyarr->array);
+    GET_TC(tc)->itemValue = PyArray_GETITEM(arrayobj, npyarr->dataptr);
   }
 
   npyarr->dataptr += npyarr->stride;