perf print-events: Remove redundant comparison with zero

Since variable npmus is unsigned int, comparing with 0 is unnecessary.

Signed-off-by: Kang Minchul <tegongkang@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221105135932.81612-1-tegongkang@gmail.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>