Deprecate prepending https:// in tries to load modules

[mstoykov]

What?

Change the message to make it explicit prepending https:// to module specifiers is deprecated.

Why?

It was there only as that was how remote modules were only loadable before it was changed that full URLs are supported.

As there have been 4 years and it seems like nobody is using this anymore, removing it removes some guessing and warning messages that mostly confuse users.

Checklist

• I have performed a self-review of my code.
• I have added tests for my changes.
• I have run linter locally (make ci-like-lint) and all checks pass.
• I have run tests locally (make tests) and all tests pass.
• I have commented on my code, particularly in hard-to-understand areas.

Related PR(s)/Issue(s)

Part of #3287

Changelog

breaking: deprecate k6 figuring out if an import specifier is a URL by trying to resolve it by prepending https:// in case it can't figure it out. To be fully removed v0.48.0.

[codecov-commenter]

Codecov Report

Merging #3288 (3d276b0) into master (420767c) will decrease coverage by 0.06%.
The diff coverage is 100.00%.

❗ Current head 3d276b0 differs from pull request most recent head 43df59a. Consider uploading reports for the commit 43df59a to get more accurate results

@@            Coverage Diff             @@
##           master    #3288      +/-   ##
==========================================
- Coverage   73.21%   73.16%   -0.06%     
==========================================
  Files         258      256       -2     
  Lines       19884    19879       -5     
==========================================
- Hits        14559    14544      -15     
- Misses       4402     4407       +5     
- Partials      923      928       +5     

Flag	Coverage Δ
ubuntu	73.16% <100.00%> (+0.01%)	⬆️
windows	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
loader/loader.go	83.56% <100.00%> (ø)

... and 9 files with indirect coverage changes