strparser: Remove unused __strp_unpause

The last use of __strp_unpause() was removed in 2022 by
commit 84c61fe1 ("tls: rx: do not use the standard strparser")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250501002402.308843-1-linux@treblig.org


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