chore: remove multi-line comment blocks added in PR #60

[poxet]

Cleans up two multi-line inline comment blocks I introduced in #60, which break the Coding Guidelines: single-line inline comments only, no multi-line inline comment blocks.

.github/workflows/build.yml

The Test with coverage step had a one-line comment already; I appended two more lines about the Microsoft.Testing.Platform migration, making it a three-line block. Those two lines are removed — the flags are self-describing and global.json declares the runner, so the explanation was history rather than something the file needs. The original single line about skipping Integration and TimeCritical tests stays.

Tharga.Cache.Tests/AddCacheConcurrencyTests.cs

The note on MarkerType was two lines; reduced to one:

// Nesting Marker in itself yields N distinct cache types without N declared classes.

This one earns its single line — the nested-generic trick is genuinely non-obvious from the code alone, which is exactly the case exception (b) exists for.

Not touched

build.yml has three pre-existing multi-line blocks (the Compute version, Resolve build version and Push to NuGet steps). They predate my work, so removing them is a separate decision and not folded in here.

Comment-only changes; verified with a Release build and the CI-filtered suite: 467 tests, 465 passed, 2 skipped.

[poxet]

Superseded by #64, which carries this change together with the version bump and the mission.md corrections in a single PR.