Remove DSI LCD entry: no dedicated display in scope

The Orin Nano Developer Kit exposes no DSI connector — the module carries DSI
on SODIMM pins but the reference carrier board does not break them out, and
DisplayPort is its only display output. The Waveshare panel is also a
Raspberry Pi accessory and mechanically incompatible. It could not have been
connected without a custom carrier board.

Moot regardless: the tablet is the display, and no dedicated display is in
scope. The entry was still marked research pending / TBD.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013kj58Jugkic783b8ZrtTVZ

docs/BOM.md

@@ -52,19 +52,3 @@ type: reference
 - M.2 B KEY is **not** mechanically compatible with Mini-PCIe.
 - Supply voltage should be ~4.0 V for reliable operation.
 - DO NOT hot-plug while powered.
-
-## Waveshare SIM7600G-H-M.2
-
-[link](https://www.waveshare.com/wiki/4.3inch_DSI_LCD)
-
-| Field | Value |
-|-------|-------|
-| **Manufacturer** | Waveshare |
-
-### Required software
-
-research pending  
-
-### Notes
-
-TBD