Cleanup obsolete TODO comments

[medikoo]

TODO comments in most cases indicate changes proposed for the next major (so they're not lost).

Some of them are no longer actual, or were left over by mistake. This PR cleans that up.

Additionally improved log on custom resource building. It's a long time it doesn't involve npm install and yet log messages suggested that)

[codecov]

Codecov Report

Merging #10496 (cf6ba41) into master (452e4d8) will not change coverage.
The diff coverage is 100.00%.

❗ Current head cf6ba41 differs from pull request most recent head ca74b9b. Consider uploading reports for the commit ca74b9b to get more accurate results

@@           Coverage Diff           @@
##           master   #10496   +/-   ##
=======================================
  Coverage   85.83%   85.83%           
=======================================
  Files         335      335           
  Lines       13931    13931           
=======================================
  Hits        11958    11958           
  Misses       1973     1973           

Impacted Files	Coverage Δ
lib/classes/CLI.js	57.14% <ø> (ø)
lib/configuration/variables/index.js	90.47% <ø> (ø)
lib/plugins/aws/provider.js	94.97% <ø> (ø)
lib/plugins/aws/customResources/index.js	98.61% <100.00%> (ø)

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[pgrzesik]

Good call 👍