ttyprintk: remove redundant initialization of variable i

The variable i is being initialized with a value that is never read,
it is being updated later on.  The assignment is redundant and can be
removed.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Addresses-Coverity: ("Unused value")
Link: https://lore.kernel.org/r/20210518182126.140978-1-colin.king@canonical.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>