Disable tap detection by default, simplify tracking

source/sleep.cpp

@@ -61,7 +61,7 @@ static void lsmWrite(uint8_t reg, uint8_t val) {
   Wire1.endTransmission();
 }
 
-// ISR 
+// ISR
 static void imuInt1ISR() {
   imuWakeFlag = true;
 }
@@ -206,10 +206,8 @@ void sleepManagerWakeIMU() {
 
   // Reset motion filter state to prevent a cursor jump on the first frame.
   extern float accumX, accumY;
-  extern float prevAx, prevAy, prevAz;
   extern unsigned long lastTime;
   accumX = accumY = 0.0f;
-  prevAx = 0.0f; prevAy = 0.0f; prevAz = 0.0f;
   lastTime = millis();
 
   sleepStage = SLEEP_AWAKE;