Removed SDL_SensorGetDataWithTimestamp() and SDL_GameControllerGetSensorDataWithTimestamp()

If you care about timestamps you'll also want to catch all of the sensor events instead of just polling the current state. For example, Nintendo Switch controllers generate 3 sensor events with distinct values for each polling interval.

src/sensor/SDL_syssensor.h

@@ -35,7 +35,6 @@ struct _SDL_Sensor
     SDL_SensorType type;        /* Type of the sensor */
     int non_portable_type;      /* Platform dependent type of the sensor */
 
-    Uint64 sensor_timestamp;    /* The timestamp of the last sensor update */
     float data[16];             /* The current state of the sensor */
 
     struct _SDL_SensorDriver *driver;