fix: Clean up xhrWrappable

[cwli24]

Remove xhrWrappable which is an old variable checking for addEventListener on XHR. It is expected to have no compatibility impact on modern standard frameworks or browsers.

Overview

Delete presumably dead and ineffectively redundant code blocking trace, ajax, and spa if the addEventListener on XHR prototype somehow isn't a function. We've had no report of such case. This is a remnant of old IE.

Related Issue(s)

Follow-up of https://new-relic.atlassian.net/browse/NR-57395

Testing

Standard

[github-actions]

Asset Size Report

Merging this pull request will result in the following asset size changes:

Agent	Asset	Previous Size	New Size	Diff
lite	loader	31.83 kB / 11.13 kB (gzip)	31.75 kB / 11.1 kB (gzip)	-0.25% / -0.26% (gzip)
lite	async-chunk	51 kB / 16.59 kB (gzip)	51 kB / 16.59 kB (gzip)	0% / 0% (gzip)
pro	loader	51.75 kB / 17.55 kB (gzip)	51.64 kB / 17.51 kB (gzip)	-0.21% / -0.22% (gzip)
pro	async-chunk	93.55 kB / 28.58 kB (gzip)	93.51 kB / 28.57 kB (gzip)	-0.04% / -0.05% (gzip)
spa	loader	59.7 kB / 19.98 kB (gzip)	59.55 kB / 19.93 kB (gzip)	-0.25% / -0.26% (gzip)
spa	async-chunk	108.62 kB / 32.99 kB (gzip)	108.58 kB / 32.97 kB (gzip)	-0.04% / -0.04% (gzip)
lite-polyfills	loader	125.76 kB / 40.43 kB (gzip)	125.65 kB / 40.39 kB (gzip)	-0.09% / -0.1% (gzip)
lite-polyfills	async-chunk	65.72 kB / 18.91 kB (gzip)	65.72 kB / 18.91 kB (gzip)	0% / 0% (gzip)
pro-polyfills	loader	146.01 kB / 46.43 kB (gzip)	145.73 kB / 46.36 kB (gzip)	-0.19% / -0.14% (gzip)
pro-polyfills	async-chunk	128.4 kB / 33.43 kB (gzip)	128.36 kB / 33.41 kB (gzip)	-0.03% / -0.05% (gzip)
spa-polyfills	loader	154.03 kB / 48.55 kB (gzip)	153.71 kB / 48.49 kB (gzip)	-0.21% / -0.14% (gzip)
spa-polyfills	async-chunk	145.21 kB / 38.05 kB (gzip)	145.17 kB / 38.03 kB (gzip)	-0.03% / -0.05% (gzip)

[github-actions]

Last ran on April 23, 2024 16:22:30 CDT
Checking merge of (b05df46) into main (3cba945)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.93%. Comparing base (3cba945) to head (b05df46).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1000      +/-   ##
==========================================
+ Coverage   83.89%   83.93%   +0.03%     
==========================================
  Files         154      154              
  Lines        7165     7157       -8     
  Branches     1420     1417       -3     
==========================================
- Hits         6011     6007       -4     
+ Misses        983      982       -1     
+ Partials      171      168       -3     

Flag	Coverage Δ
integration-tests	90.47% <ø> (-0.01%)	⬇️
unit-tests	67.46% <ø> (+<0.01%)	⬆️

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