Shorten some Array.prototype.map() callbacks

[Snuffleupagus]

In a few spots we can directly pass the function, and don't need to create an "intermediate" arrow function.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 90.16%. Comparing base (b96d745) to head (263bc08).

Files with missing lines	Patch %	Lines
src/core/xfa/xhtml.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #21780   +/-   ##
=======================================
  Coverage   90.15%   90.16%           
=======================================
  Files         264      264           
  Lines       67253    67251    -2     
=======================================
+ Hits        60632    60635    +3     
+ Misses       6621     6616    -5     

Flag	Coverage Δ
browsertest	66.33% <66.66%> (+<0.01%)	⬆️
fonttest	9.00% <100.00%> (ø)
integrationtest	69.36% <66.66%> (+<0.01%)	⬆️
unittest	58.27% <33.33%> (+<0.01%)	⬆️
unittestcli	56.80% <33.33%> (-0.01%)	⬇️

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[Snuffleupagus]

/botio browsertest

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Received

Command cmd_browsertest from @Snuffleupagus received. Current queue size: 1

Live output at: http://54.241.84.105:8877/0181c4c34b0a3d4/output.txt

[moz-tools-bot]

From: Bot.io (Windows)

---

Received

Command cmd_browsertest from @Snuffleupagus received. Current queue size: 1

Live output at: http://54.193.163.58:8877/764c63f42df19a0/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Success

Full output at http://54.241.84.105:8877/0181c4c34b0a3d4/output.txt

Total script time: 17.91 mins

• Regression tests: Passed

[moz-tools-bot]

From: Bot.io (Windows)

---

Success

Full output at http://54.193.163.58:8877/764c63f42df19a0/output.txt

Total script time: 22.10 mins

• Regression tests: Passed

[calixteman]

LGTM. Thank you.

[timvandermeij]

Thanks!