Remove never implemented MODULE_SUPPORTED_DEVICE

MODULE_SUPPORTED_DEVICE is remove from upstream since March 17, 2021.
See linux.git commit 6417f03

Reported by Niklas Lantau <niklaslantau@gmail.com>
Close #61

examples/hello-4.c

@@ -8,7 +8,6 @@
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("LKMPG");
 MODULE_DESCRIPTION("A sample driver");
-MODULE_SUPPORTED_DEVICE("testdevice");
 
 static int __init init_hello_4(void)
 {