media: rc: simplify ir_raw_event_store_edge()

Since commit 12749b198fa4 ("[media] rc: saa7134: add trailing space for
timely decoding"), the workaround of inserting reset events is no
longer needed.

Note that the initial reset is not needed either; other rc-core drivers
that don't use ir_raw_event_store_edge() never call this at all.

Verified on a HVR-1150 and Raspberry Pi.

Fixes: 3f5c4c73 ("[media] rc: fix ghost keypresses with certain hw")

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>