BOT: Fix #839: Remove test_columns_not_present() wrapper

[nikosbosse]

Summary

• Removes the trivial test_columns_not_present() wrapper function that simply delegated to checkmate::test_names(..., disjunct.from = ...)
• Replaces the single call site in assert_forecast.forecast_binary() with an inline test_names() call
• Deletes the function definition, its test block, and generated man page

Closes #839

Root cause

test_columns_not_present() was a 1-line wrapper around an already-imported checkmate function, adding unnecessary indirection.

What changed

• R/class-forecast-binary.R: Replaced test_columns_not_present(forecast, ...) with test_names(colnames(forecast), disjunct.from = ...)
• R/check-input-helpers.R: Deleted function definition and roxygen block
• tests/testthat/test-check-input-helpers.R: Deleted the test_columns_not_present test block
• man/test_columns_not_present.Rd: Deleted generated man page
• tests/testthat/test-class-forecast-binary.R: Added tests for quantile_level column rejection, valid data acceptance, and function removal verification

Test plan

• New test: quantile_level column correctly rejected by assert_forecast.forecast_binary()
• New test: valid binary data accepted without error
• New test: test_columns_not_present no longer exists in the namespace
• Existing sample_id column rejection test continues to pass
• Full test suite passes (679 tests, 0 failures)
• R CMD check: 0 errors, 0 warnings, 2 pre-existing notes

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.83%. Comparing base (ac0c01a) to head (ca004a2).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1083      +/-   ##
==========================================
- Coverage   97.83%   97.83%   -0.01%     
==========================================
  Files          35       35              
  Lines        1845     1844       -1     
==========================================
- Hits         1805     1804       -1     
  Misses         40       40              

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[nikosbosse]

CLAUDE: Clean, minimal removal of a trivial wrapper function. The inline replacement of test_columns_not_present() with test_names(colnames(forecast), disjunct.from = ...) is semantically identical — verified by reading the original function body. All 4 test specifications are covered (sample_id rejection, quantile_level rejection, valid data acceptance, function removal verification). No issues found. NAMESPACE correctly updated. Verdict: approve.