removed @current as it is not used

[phoet]

Summary

Was trying to answer a question on stackoverflow and looking into the logic of how folders end up in the autoloadpath. Trying to understand the logic it looked to me that @current is used nowhere in Root itself and most likely a reminiscent from a refactoring.

Unit-Tests are still 🍏

 |2.3.0| workify in ~/Documents/rails/rails/railties
± |current_is_not_used ✓| → ruby -I"lib:test" test/paths_test.rb
Run options: --seed 61508

# Running:

....................................

Finished in 0.004794s, 7508.9356 runs/s, 13766.3820 assertions/s.

36 runs, 66 assertions, 0 failures, 0 errors, 0 skips

[matthewd]

Thanks!