removed old prototype

src/main.c

@@ -31,7 +31,6 @@ void displayArray(const uint8_t **image, int repeat, int frames, int reverse, in
 void SysTick_Handler(void);
 static void APP_SystemClockConfig(void);
 static void LPTIMInit(void);
-static void LPTIMStart(uint32_t count);
 void HAL_LPTIM_AutoReloadMatchCallback(LPTIM_HandleTypeDef *hlptim);
 void LPTIM1_IRQHandler(void);
 void LPTIM_Delay(uint32_t millis);