printk: remove obsolete check for log level "c"

printk: remove obsolete check for log level "c"

The kernel log level "c" was removed in commit 61e99ab8e35a ("printk:
remove the now unnecessary "C" annotation for KERN_CONT").  It is no
longer detected in printk_get_level().  Hence we do not need to check it
in vprintk_emit.

Signed-off-by: Petr Mladek <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Kay Sievers <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>