rv/reactor: remove MODULE_LICENSE in non-modules

Since commit 8b41fc4454e ("kbuild: create modules.builtin without
Makefile.modbuiltin or tristate.conf"), MODULE_LICENSE declarations
are used to identify modules. As a consequence, uses of the macro
in non-modules will cause modprobe to misidentify their containing
object file as a module when it is not (false positives), and modprobe
might succeed rather than failing with a suitable error message.

So remove it in the files in this commit, none of which can be built as
modules.

Signed-off-by: Nick Alcock <[e-mail]>
Suggested-by: Luis Chamberlain <[e-mail]>
Acked-by: Daniel Bristot de Oliveira <[e-mail]>
Cc: Luis Chamberlain <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Cc: Hitomi Hasegawa <[e-mail]>
Cc: Daniel Bristot de Oliveira <[e-mail]>
Cc: Steven Rostedt <[e-mail]>
Cc: Masami Hiramatsu <[e-mail]>
Cc: [e-mail]
Cc: [e-mail]
Signed-off-by: Luis Chamberlain <[e-mail]>

kernel/trace/rv/reactor_panic.c

···
 module_init(register_react_panic);
 module_exit(unregister_react_panic);
 
-MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Daniel Bristot de Oliveira");
 MODULE_DESCRIPTION("panic rv reactor: panic if an exception is found.");

kernel/trace/rv/reactor_printk.c

···
 module_init(register_react_printk);
 module_exit(unregister_react_printk);
 
-MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Daniel Bristot de Oliveira");
 MODULE_DESCRIPTION("printk rv reactor: printk if an exception is hit.");