eventdev: remove redundant reset on timer cancel
eventdev: remove redundant reset on timer cancel

There is no thread will access these impl_opaque data after timer
canceled. When new timer armed, it got refilled. So the cleanup
process is unnecessary.

Cc: stable@dpdk.org

Signed-off-by: Phil Yang <5a9b6465c065ff0e1fd5d2cb9eb2185e82f34247@arm.com>
Reviewed-by: Dharmik Thakkar <724f3610823e4b14afc73144686337ac966281c2@arm.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk