Simplify tracking

source/sleep.cpp

@@ -186,24 +186,11 @@ void sleepManagerWakeIMU() {
   lpEnteredMs   = 0;
 
   // Reset motion filter state to prevent a cursor jump on the first frame.
-  // After sleep: angleX/Y are stale, gravX/Y/Z drifted, accumX/Y is dirty,
-  // and lastTime is old so dt would be huge on the first loop iteration.
-  // Zeroing these here means the first frame integrates 0 motion cleanly.
-  extern float angleX, angleY;
   extern float accumX, accumY;
-  extern float gravX, gravY, gravZ;
   extern float prevAx, prevAy, prevAz;
   extern unsigned long lastTime;
-  angleX = angleY = 0.0f;
   accumX = accumY = 0.0f;
-  // Reseed gravity from current accel so projection is correct immediately.
-  // Can't call imu.readFloat* here (gyro not fully settled), but accel is
-  // already running - read it directly via Wire1.
-  // Simpler: just reset to neutral [0,0,1] and let the LP filter converge
-  // over the first ~20 frames (200 ms) of real use.
-  gravX = 0.0f; gravY = 0.0f; gravZ = 1.0f;
   prevAx = 0.0f; prevAy = 0.0f; prevAz = 0.0f;
-  // Set lastTime to now so the first dt = 0 rather than (now - sleepEntryTime)
   lastTime = millis();
 
   sleepStage = SLEEP_AWAKE;