HID: qvr: Removing unnecessary code

External viewer starts streaming when VR service
requests for data using IOCTLs. So, the code which
starts streaming data on device probe is not needed.

Change-Id: I251fe4d21123260687d610f0d31fdf64e9f71a1c
Signed-off-by: Rohit Bandi <rohitbandi@codeaurora.org>