Add missing serial dump files for YOTC M2-2050-G40 (#456)

* Add missing serial dump placeholder files for YOTC M2-2050-G40

Agent-Logs-Url: https://github.com/hack-gpon/hack-gpon.github.io/sessions/4bfa76ee-0c94-4fac-8cc8-aa95902fae5d

Co-authored-by: simonebortolin <26844016+simonebortolin@users.noreply.github.com>

* Remove serial_dump include references and placeholder files for YOTC M2-2050-G40

Agent-Logs-Url: https://github.com/hack-gpon/hack-gpon.github.io/sessions/b3ae6b67-e0ee-46bd-8822-6c353921cfea

Co-authored-by: simonebortolin <26844016+simonebortolin@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: simonebortolin <26844016+simonebortolin@users.noreply.github.com>

Author: Copilot

_ont/ont-yotc-m2-2050-g40.md

@@ -38,10 +38,6 @@ parent: YOTC
 
 {% include image.html file="yotc-m2-2050-g40-ttl.jpg" alt="Serial Pinout (dont connect vcc)" caption="Serial Pinout (dont connect vcc)" %}
 
-{% include serial_dump.html file="yotcm2-2050-g40.txt" alt="M2-2050-G40 boot dump" title="M2-2050-G40 boot dump" %}
-
-{% include serial_dump.html file="yotcm2-2050-g40newrevision.txt" alt="M2-2050-G40 boot dump (newer revision)" title="M2-2050-G40 boot dump (newer revision)" %}
-
 
 ## List of Software versions
 - 518_V300R02B15 (doesn't have upg_app, wget, wget_manage)