selftests/bpf: Delete extra blank lines in test_sockmap

Delete extra blank lines inside of test_selftest().
Signed-off-by: Zhu Jun <zhujun2@cmss.chinamobile.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20240627031905.7133-1-zhujun2@cmss.chinamobile.com

tools/testing/selftests/bpf/test_sockmap.c

@@ -1936,7 +1936,6 @@ static void test_selftests_ktls(int cg_fd, struct sockmap_options *opt)
 
 static int test_selftest(int cg_fd, struct sockmap_options *opt)
 {
-
 	test_selftests_sockmap(cg_fd, opt);
 	test_selftests_sockhash(cg_fd, opt);
 	test_selftests_ktls(cg_fd, opt);