bpo-37999: No longer use __int__ in implicit integer conversions. (GH-15636)

Only __index__ should be used to make integer conversions lossless.
diff --git a/Objects/stringlib/clinic/transmogrify.h.h b/Objects/stringlib/clinic/transmogrify.h.h
index 8a3a060..8dd7e6b 100644
--- a/Objects/stringlib/clinic/transmogrify.h.h
+++ b/Objects/stringlib/clinic/transmogrify.h.h
@@ -33,11 +33,6 @@
     if (!noptargs) {
         goto skip_optional_pos;
     }
-    if (PyFloat_Check(args[0])) {
-        PyErr_SetString(PyExc_TypeError,
-                        "integer argument expected, got float" );
-        goto exit;
-    }
     tabsize = _PyLong_AsInt(args[0]);
     if (tabsize == -1 && PyErr_Occurred()) {
         goto exit;
@@ -73,11 +68,6 @@
     if (!_PyArg_CheckPositional("ljust", nargs, 1, 2)) {
         goto exit;
     }
-    if (PyFloat_Check(args[0])) {
-        PyErr_SetString(PyExc_TypeError,
-                        "integer argument expected, got float" );
-        goto exit;
-    }
     {
         Py_ssize_t ival = -1;
         PyObject *iobj = PyNumber_Index(args[0]);
@@ -134,11 +124,6 @@
     if (!_PyArg_CheckPositional("rjust", nargs, 1, 2)) {
         goto exit;
     }
-    if (PyFloat_Check(args[0])) {
-        PyErr_SetString(PyExc_TypeError,
-                        "integer argument expected, got float" );
-        goto exit;
-    }
     {
         Py_ssize_t ival = -1;
         PyObject *iobj = PyNumber_Index(args[0]);
@@ -195,11 +180,6 @@
     if (!_PyArg_CheckPositional("center", nargs, 1, 2)) {
         goto exit;
     }
-    if (PyFloat_Check(args[0])) {
-        PyErr_SetString(PyExc_TypeError,
-                        "integer argument expected, got float" );
-        goto exit;
-    }
     {
         Py_ssize_t ival = -1;
         PyObject *iobj = PyNumber_Index(args[0]);
@@ -252,11 +232,6 @@
     PyObject *return_value = NULL;
     Py_ssize_t width;
 
-    if (PyFloat_Check(arg)) {
-        PyErr_SetString(PyExc_TypeError,
-                        "integer argument expected, got float" );
-        goto exit;
-    }
     {
         Py_ssize_t ival = -1;
         PyObject *iobj = PyNumber_Index(arg);
@@ -274,4 +249,4 @@
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=15be047aef999b4e input=a9049054013a1b77]*/
+/*[clinic end generated code: output=cd5ecdbf1d9e849a input=a9049054013a1b77]*/