chore: Fix lint warnings in propagator-jaeger, propagator-b3, resources, and sdk-metrics-base packages

[alisabzevari]

Which problem is this PR solving?

• This PR fixes lint warnings in propagator-jaeger, propagator-b3, resources, and sdk-metrics-base packages (related to Fix lint warnings #1093)

Short description of the changes

• Fix lint warnings

[alisabzevari]

I removed export by intuition. Let me know if I did wrong here.

[dyladan]

If the tests pass it's probably fine. It might have been exported for those

[codecov]

Codecov Report

Merging #2406 (f5ac849) into main (33e6f71) will decrease coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2406      +/-   ##
==========================================
- Coverage   92.64%   92.62%   -0.03%     
==========================================
  Files         137      137              
  Lines        4975     4975              
  Branches     1048     1048              
==========================================
- Hits         4609     4608       -1     
- Misses        366      367       +1     

Impacted Files	Coverage Δ
...pentelemetry-sdk-metrics-base/src/MeterProvider.ts	88.57% <ø> (ø)
...entelemetry-propagator-b3/src/B3MultiPropagator.ts	100.00% <100.00%> (ø)
...es/opentelemetry-propagator-b3/src/B3Propagator.ts	100.00% <100.00%> (ø)
...ntelemetry-propagator-b3/src/B3SinglePropagator.ts	100.00% <100.00%> (ø)
...elemetry-propagator-jaeger/src/JaegerPropagator.ts	100.00% <100.00%> (ø)
...esources/src/platform/node/default-service-name.ts	100.00% <100.00%> (ø)
...lemetry-sdk-metrics-base/src/BaseObserverMetric.ts	100.00% <100.00%> (ø)
...emetry-sdk-metrics-base/src/BatchObserverResult.ts	100.00% <100.00%> (ø)
...pentelemetry-sdk-metrics-base/src/CounterMetric.ts	100.00% <100.00%> (ø)
...kages/opentelemetry-sdk-metrics-base/src/Metric.ts	90.24% <100.00%> (ø)
... and 4 more