remove click 7 tox env

tox.ini

@@ -1,7 +1,6 @@
 [tox]
 envlist =
     py3{11,10,9,8,7},pypy3{8,7}
-    py39-click7
     style
     typing
     docs
@@ -11,8 +10,6 @@ skip_missing_interpreters = true
 deps =
     -r requirements/tests.txt
 
-    click7: click<8
-
     examples/tutorial[test]
     examples/javascript[test]
 commands = pytest -v --tb=short --basetemp={envtmpdir} {posargs:tests examples}