chelsio/chtls: Remove unused chtls_set_tcb_tflag

chtls_set_tcb_tflag() has been unused since 2021's commit
827d3291 ("chtls: Remove invalid set_tcb call")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241007004652.150065-1-linux@treblig.org


Signed-off-by: Jakub Kicinski <kuba@kernel.org>