i40e: removed no longer needed delays

Removed no longer needed delays.  At preproduction stage those delays were
needed but now these delays are not needed.

Signed-off-by: Bimmy Pujari <bimmy.pujari@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>