perf stat: Remove print_mixed_hw_group_error

print_mixed_hw_group_error will print a warning when a group of events
uses different PMUs.

This isn't possible to happen as parse_events__sort_events_and_fix_groups()
will break groups when this happens, adding the warning at the start
of perf of:

  WARNING: events were regrouped to match PMUs

As the previous mixed group warning can never happen, remove the
associated code.

Committer testing:

Before/after:

  acme@five:~$ perf stat -e '{cpu_core/cycles/,cpu_atom/cycles/}' sleep 1
  WARNING: events were regrouped to match PMUs

   Performance counter stats for 'sleep 1':

             424,895      cpu_atom/cycles/u
       <not counted>      cpu_core/cycles/u         (0.00%)

         1.011862314 seconds time elapsed

         0.000000000 seconds user
         0.003166000 seconds sys

  acme@five:~$

Reviewed-by: Kan Liang <[email protected]>
Signed-off-by: Ian Rogers <[email protected]>
Tested-by: Arnaldo Carvalho de Melo <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: Alexander Shishkin <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Dominique Martinet <[email protected]>
Cc: Dr. David Alan Gilbert <[email protected]>
Cc: Howard Chu <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: James Clark <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Levi Yun <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Weilin Wang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

0 files changed, 0 insertions, 0 deletions