nasmlib: Drop unused seg_init
nasmlib: Drop unused seg_init

The helper has been eliminated in 2c4a4d5810d0a59b033a07876a2648ef5d4c2859

https://bugzilla.nasm.us/show_bug.cgi?id=3392461

Signed-off-by: Cyrill Gorcunov <7a1ea01eee6961eb1e372e3508c2670446d086f4@gmail.com>

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm