Remove duplicate metrics from memorylimiter

[bogdandrutu]

Same values are recorded as "processor/refused_spans"

Signed-off-by: Bogdan Drutu [email protected]

[codecov]

Codecov Report

Merging #2841 (692d188) into main (4aeef52) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2841      +/-   ##
==========================================
- Coverage   91.76%   91.74%   -0.03%     
==========================================
  Files         286      285       -1     
  Lines       15100    15076      -24     
==========================================
- Hits        13857    13831      -26     
- Misses        850      851       +1     
- Partials      393      394       +1     

Impacted Files	Coverage Δ
processor/memorylimiter/memorylimiter.go	90.00% <ø> (-0.36%)	⬇️
service/telemetry.go	85.18% <ø> (-0.27%)	⬇️
processor/batchprocessor/batch_processor.go	84.49% <100.00%> (ø)
processor/batchprocessor/metrics.go	100.00% <100.00%> (ø)
obsreport/obsreport.go	91.30% <0.00%> (-2.90%)	⬇️

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[dmitryax]

Should we put it in the breaking changes list for the new version?