Remove all OTA subsystem (gitea_ota, ota_self, uart_ota, ota_display) and balance-bot safety checks (tilt cutoff, BAL_TILT_FAULT) so the firmware builds without cJSON/WiFi/HTTP dependencies. Core UART protocol, VESC CAN drive, differential steering, and PID tuning remain intact. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>