core: remove an unnecessary else
core: remove an unnecessary else

This else is not useful as all other if (else)'s in this block return.

Signed-off-by: Bartosz Golaszewski <108de5fbc428215dc26df4468b48691526611148@gmail.com>

brgl/libgpiod,brgl/libgpiod,brgl/libgpiod,brgl/libgpiod