perf intel-pt/bts: Remove unused SAMPLE_SIZE defines and bts priv array

perf intel-pt/bts: Remove unused SAMPLE_SIZE defines and bts priv array

These defines were probably dragged in from sampling support in earlier
patches.  They can be put back when needed.

Signed-off-by: Kim Phillips <[email protected]>
Acked-by: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>