Issue #3080: Remove unused argument of _PyImport_GetDynLoadFunc()

The first argument, fqname, was not used.
diff --git a/Python/dynload_dl.c b/Python/dynload_dl.c
index 2606e1e..dc00ec5 100644
--- a/Python/dynload_dl.c
+++ b/Python/dynload_dl.c
@@ -16,7 +16,7 @@
 };
 
 
-dl_funcptr _PyImport_GetDynLoadFunc(const char *fqname, const char *shortname,
+dl_funcptr _PyImport_GetDynLoadFunc(const char *shortname,
 				    const char *pathname, FILE *fp)
 {
 	char funcname[258];