Remove USE_VIRTUAL_GYRO defintion for AT32F435

[SteveCEvans]

This was resulting in a bogus second gyro as per the below.

# status
MCU AT32F435 Clock=288MHz, Vref=3.29V, Core temp=57degC
Stack size: 2048, Stack address: 0x2002fff0
Configuration: CONFIGURED, size: 3526, max available: 16384
Devices detected: SPI:1, I2C:1
Gyros detected: gyro 1, gyro 2 locked
GYRO=VIRTUAL, BARO=DPS310

[github-actions]

Do you want to test this code? Here you have an automated build:
Assets
WARNING: It may be unstable. Use only for testing! See: https://www.youtube.com/watch?v=I1uN9CN30gw for instructions for unified targets!

[blckmn]

AUTOMERGE: (FAIL)

• github identifies PR as mergeable -> FAIL
• assigned to a milestone -> PASS
• cooling off period lapsed -> FAIL
• commit count less or equal to three -> PASS
• Don't merge label NOT found -> PASS
• at least one RN: label found -> PASS
• Tested label found -> FAIL
• assigned to an approver -> PASS
• approver count at least three -> FAIL