Minor cleanups in the drivers

src/drivers/hmc5883/hmc5883.cpp

@@ -1292,10 +1292,6 @@ test()
 	if (fd < 0)
 		err(1, "%s open failed (try 'hmc5883 start' if the driver is not running", MAG_DEVICE_PATH);
 
-	/* set the queue depth to 10 */
-	if (OK != ioctl(fd, SENSORIOCSQUEUEDEPTH, 10))
-		errx(1, "failed to set queue depth");
-
 	/* do a simple demand read */
 	sz = read(fd, &report, sizeof(report));
 

src/drivers/lsm303d/lsm303d.cpp

@@ -531,7 +531,6 @@ LSM303D::reset()
 	/* enable mag */
 	write_reg(ADDR_CTRL_REG7, REG7_CONT_MODE_M);
 	write_reg(ADDR_CTRL_REG5, REG5_RES_HIGH_M);
-	irqrestore(flags);
 
 	accel_set_range(LSM303D_ACCEL_DEFAULT_RANGE_G);
 	accel_set_samplerate(LSM303D_ACCEL_DEFAULT_RATE);