Remove TIM2 CH3 CH4 PWM Config
Remove TIM2 CH3 CH4 PWM Config

Because we still have TIM CH3 and CH4 in PWM config, It has some  time
base conflic problem. I decide I will not use TIM for PWM output in
future.

zxc2694/moonbear-firmware,fboris/firmware,UrsusPilot/firmware,ming6842/firmware-new,shengwen1997/moonbear-firmware,shengwen1997/moonbear-firmware,fboris/firmware,ming6842/firmware-new,shengwen1997/moonbear-firmware,UrsusPilot/firmware,ming6842/firmware,UrsusPilot/firmware,ming6842/firmware-new,zxc2694/moonbear-firmware,ming6842/firmware,fboris/firmware,ming6842/firmware,zxc2694/moonbear-firmware