scsi: target: docs: Remove tcm_mod_builder.py

This script is not used and requires additional development to sync with
the SCSI target code.

Signed-off-by: Rong Tao <rongtao@cestc.cn>
Link: https://lore.kernel.org/r/tencent_58D7935159C421036421B42CD04B0A959207@qq.com


Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>