chore: remove unused dependency

[dyladan]

Fixes #1820

This version of axios is triggering security alerts so it is important to merge this soon. The dependency is unused so this should be no problem.

[codecov]

Codecov Report

Merging #1822 (bfac17d) into master (14931ce) will decrease coverage by 0.22%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1822      +/-   ##
==========================================
- Coverage   92.49%   92.27%   -0.23%     
==========================================
  Files         173      169       -4     
  Lines        6038     5721     -317     
  Branches     1284     1234      -50     
==========================================
- Hits         5585     5279     -306     
+ Misses        453      442      -11     

Impacted Files	Coverage Δ
...-instrumentation-fetch/src/enums/AttributeNames.ts
...mentation-xml-http-request/src/enums/EventNames.ts
...s/opentelemetry-instrumentation-fetch/src/fetch.ts
...emetry-instrumentation-xml-http-request/src/xhr.ts