rust: devres: remove unused import

As far as I can tell, `c_str` was never used, hence remove it.

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
Link: https://lore.kernel.org/r/20250704-cstr-include-devres-v1-1-4ee9e56fca09@gmail.com
Signed-off-by: Danilo Krummrich <dakr@kernel.org>
This commit is contained in:
Tamir Duberstein 2025-07-04 16:11:02 -04:00 • committed by Danilo Krummrich
commit 6d16cd5769