Remove bad & duplicate metric

[soothing-rain]

/kind improvement

Signed-off-by: Yuchen Gao yuchen.gao@zilliz.com

[codecov]

Codecov Report

Merging #20905 (b5ac5de) into master (5a6a92d) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #20905      +/-   ##
==========================================
- Coverage   81.69%   81.66%   -0.03%     
==========================================
  Files         692      692              
  Lines       93176    93179       +3     
==========================================
- Hits        76116    76094      -22     
- Misses      14000    14019      +19     
- Partials     3060     3066       +6     

Impacted Files	Coverage Δ
internal/datanode/channel_meta.go	93.79% <ø> (-0.06%)	⬇️
internal/metrics/datanode_metrics.go	100.00% <ø> (ø)
internal/querycoordv2/job/scheduler.go	88.42% <0.00%> (-6.32%)	⬇️
internal/querycoordv2/dist/dist_handler.go	71.59% <0.00%> (-5.33%)	⬇️
internal/querycoordv2/checkers/segment_checker.go	85.41% <0.00%> (-1.57%)	⬇️
internal/querycoordv2/session/cluster.go	67.98% <0.00%> (-1.48%)	⬇️
internal/datacoord/segment_manager.go	86.24% <0.00%> (-1.44%)	⬇️
internal/indexcoord/flush_segment_watcher.go	95.88% <0.00%> (-1.24%)	⬇️
internal/distributed/querynode/client/client.go	89.81% <0.00%> (-1.14%)	⬇️
internal/indexcoord/garbage_collector.go	92.02% <0.00%> (-1.07%)	⬇️
... and 15 more

[congqixia]

/lgtm

[sre-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: congqixia, soothing-rain

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