Remove unused internal member, shows that Config.DefaultHistogramBoundaries is unused

[bogdandrutu]

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

[jmacd]

Yep. FWIW this metrics SDK branch lets views control the histogram boundaries and readers control the default histogram boundaries for int64 and float64 independently.

[codecov]

Codecov Report

Merging #2765 (88cc385) into main (4bbf8d6) will increase coverage by 0.0%.
The diff coverage is 100.0%.

@@          Coverage Diff          @@
##            main   #2765   +/-   ##
=====================================
  Coverage   76.7%   76.8%           
=====================================
  Files        181     181           
  Lines      12189   12188    -1     
=====================================
+ Hits        9361    9366    +5     
+ Misses      2603    2597    -6     
  Partials     225     225           

Impacted Files	Coverage Δ
exporters/prometheus/prometheus.go	65.0% <100.0%> (-0.3%)	⬇️
exporters/jaeger/jaeger.go	91.1% <0.0%> (+0.8%)	⬆️
sdk/trace/batch_span_processor.go	82.1% <0.0%> (+1.8%)	⬆️