Issue #3080: Remove unused argument of _PyImport_GetDynLoadFunc()

The first argument, fqname, was not used.
diff --git a/Python/dynload_next.c b/Python/dynload_next.c
index cabf9b9..eb17950 100644
--- a/Python/dynload_next.c
+++ b/Python/dynload_next.c
@@ -31,8 +31,8 @@
 #define LINKOPTIONS NSLINKMODULE_OPTION_BINDNOW| \
     NSLINKMODULE_OPTION_RETURN_ON_ERROR|NSLINKMODULE_OPTION_PRIVATE
 #endif
-dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
-                                        const char *pathname, FILE *fp)
+dl_funcptr _PyImport_GetDynLoadFunc(const char *shortname,
+                                    const char *pathname, FILE *fp)
 {
     dl_funcptr p = NULL;
     char funcname[258];