build: tox now finds free threading on its own

Author: nedbat

tox.ini

@@ -60,13 +60,6 @@ commands =
 
     py3{12,13,14}{,t},anypy: python igor.py test_with_core sysmon {posargs}
 
-# Until tox properly supports no-gil interpreter selection
-[testenv:py313t]
-basepython = python3.13t
-
-[testenv:py314t]
-basepython = python3.14t
-
 [testenv:anypy]
 # $set_env.py: COVERAGE_ANYPY - The custom Python for "tox -e anypy"
 # For running against my own builds of CPython, or any other specific Python.