Adjust CI matrix to reflect upstream Django support (#9768)

Author: browniebroke

tox.ini

@@ -1,8 +1,8 @@
 [tox]
 envlist =
        {py39}-{django42}
-       {py310}-{django42,django51,django52,djangomain}
-       {py311}-{django42,django51,django52,djangomain}
+       {py310}-{django42,django51,django52}
+       {py311}-{django42,django51,django52}
        {py312}-{django42,django51,django52,djangomain}
        {py313}-{django51,django52,djangomain}
        base
@@ -45,12 +45,6 @@ deps =
        -rrequirements/requirements-testing.txt
        -rrequirements/requirements-documentation.txt
 
-[testenv:py310-djangomain]
-ignore_outcome = true
-
-[testenv:py311-djangomain]
-ignore_outcome = true
-
 [testenv:py312-djangomain]
 ignore_outcome = true