Remove support for insecure tornado versions

Author: ulgens

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
         celery-version: ['5.2.*', '5.3.*', '5.4.*', '5.5.*']
-        tornado-version: ['6.0']
+        tornado-version: ['6.5']
         exclude:  # https://docs.celeryq.dev/en/v5.2.7/whatsnew-5.2.html#step-5-upgrade-to-celery-5-2
           - python-version: '3.12'
             celery-version: '5.2.*'

tox.ini

@@ -1,13 +1,13 @@
 [tox]
 envlist =
     # Celery 5.2: only py38–py311 (py312 excluded)
-    {py38,py39,py310,py311}-celery52-{tornado60,tornado61,tornado62,tornado63,tornado64,tornado65},
+    {py38,py39,py310,py311}-celery52-tornado65,
     # Celery 5.3: py38–py312
-    {py38,py39,py310,py311,py312}-celery53-{tornado60,tornado61,tornado62,tornado63,tornado64,tornado65},
+    {py38,py39,py310,py311,py312}-celery53-tornado65,
     # Celery 5.4: py38–py312
-    {py38,py39,py310,py311,py312}-celery54-{tornado60,tornado61,tornado62,tornado63,tornado64,tornado65},
+    {py38,py39,py310,py311,py312}-celery54-tornado65,
     # Celery 5.5: py38–py312
-    {py38,py39,py310,py311,py312}-celery55-{tornado60,tornado61,tornado62,tornado63,tornado64,tornado65},
+    {py38,py39,py310,py311,py312}-celery55-tornado65,
     lint
 skip_missing_interpreters = true
 
@@ -19,11 +19,6 @@ deps =
     celery53: celery==5.3.*
     celery54: celery==5.4.*
     celery55: celery==5.5.*
-    tornado60: tornado==6.0.*
-    tornado61: tornado==6.1.*
-    tornado62: tornado==6.2.*
-    tornado63: tornado==6.3.*
-    tornado64: tornado==6.4.*
     tornado65: tornado==6.5.*
 commands =
     python -m flower --version