fix(tlora-pager): Remove SDCARD_USE_SPI1 so SX1262 and SD card can share SPI bus (#9870)

Problem:
- Inserting a µSD card causes RadioLib to hit a critical error and reboot
- Device enters a boot loop as the SD card remains inserted

Reproduction:
- Insert a µSD card and power on
- RadioLib reports a critical error on boot
- Device reboots, repeating indefinitely

Root cause:
- On T-Lora Pager, SX1262 and the µSD slot share the same physical SPI bus
  (same SCK/MOSI/MISO pins, differentiated only by CS)
- SDCARD_USE_SPI1 is intended for boards where SD is on a separate SPI bus;
  it initializes a second ESP32 SPI peripheral (SPI3) for SD
- SPI2 is already driving those same pins for LoRa, so both controllers
  simultaneously drive the same GPIO lines, causing bus contention

Fix:
- Remove SDCARD_USE_SPI1 so both devices share a single SPI peripheral (SPI2),
  with CS pins providing device selection as intended
- Tested on a custom fork of device-ui; LoRa and SD card map tiles both work
  correctly with an SD card inserted

Signed-off-by: Andrew Yong <me@ndoo.sg>

variants/esp32s3/tlora-pager/platformio.ini

@@ -26,7 +26,6 @@ build_flags = ${esp32s3_base.build_flags}
   -D T_LORA_PAGER 
   -D BOARD_HAS_PSRAM
   -D HAS_SDCARD
-  -D SDCARD_USE_SPI1
   -D ENABLE_ROTARY_PULLUP
   -D ENABLE_BUTTON_PULLUP
   -D ROTARY_BUXTRONICS