Revert code added in 5.40

Perl/perl5#19599

Author: toddr

C.xs

@@ -669,36 +669,6 @@ aux_list_thr(o)
 #endif
         } /* switch */
 
-#/* ************************************************************ */
-MODULE = B	PACKAGE = B::PADNAME	PREFIX = Padname
-#/* ************************************************************ */
-
-#/*
-#* PadnameGEN submitted to 5.36
-#* - view https://github.com/Perl/perl5/pull/19599
-#*/
-
-int
-PadnameGEN(padn)
-       B::PADNAME      padn
-    CODE:
-        RETVAL = padn->xpadn_gen;
-    OUTPUT:
-       RETVAL
-
-#/*
-#* PadnameIsUndef submitted to 5.36
-#* - view https://github.com/Perl/perl5/pull/19599
-#*/
-
-bool
-PadnameIsUndef(padn)
-       B::PADNAME      padn
-    CODE:
-        RETVAL = padn == &PL_padname_undef ? TRUE : FALSE;
-    OUTPUT:
-       RETVAL
-
 #/* ************************************************************ */
 MODULE = B     PACKAGE = B::PADNAMELIST        PREFIX = Padnamelist
 #/* ************************************************************ */