Remove Vendor_248a_Product_8266.idc

This was added to temporarily achieve some backwards compatibility on
older TV remotes. It's breaking other devices that do not use their own
vendor id / product id information.

To fix those devices, we simply remove the idc and fallback to
Generic.kl

Bug: 204397586
Test: None
Change-Id: I6e4578271563169f6404588338995526e3b57f07