simplify some rules

.github/workflows/test.yml

@@ -68,39 +68,36 @@ jobs:
 
         # https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs#expanding-or-adding-matrix-configurations
         include:
-          # test default settings with 3.11 across all supported evm versions
-          - python-version: ["3.11", "311"]
-            debug: false
+          # test default settings with default python across all supported evm
+          # versions
+          - debug: false
             opt-mode: gas
             evm-version: london
-          - python-version: ["3.11", "311"]
-            debug: false
+          - debug: false
             opt-mode: gas
             evm-version: paris
-          - python-version: ["3.11", "311"]
-            debug: false
+
+          # redundant shanghai rule, for clarity
+          - debug: false
             opt-mode: gas
             evm-version: shanghai
           # enable when py-evm makes it work:
-          #- python-version: ["3.11", "311"]
+          #-
           #  debug: false
           #  opt-mode: gas
           #  evm-version: cancun
 
           # run with `--memorymock`, but only need to do it one configuration
-          # TODO: consider removing the memorymock tests
-          - python-version: ["3.11", "311"]
-            opt-mode: gas
+          # TODO: consider removing the memorymock tests entirely
+          - opt-mode: gas
             debug: false
-            evm-version: shanghai
             memorymock: true
 
           # run across other python versions. we don't really need to run all
           # modes across all python versions - one is enough
           - python-version: ["3.10", "310"]
             opt-mode: gas
             debug: false
-            evm-version: shanghai
 
           # TODO 3.12 doesn't work yet, investigate - may be hypothesis issue
           #- python-version: ["3.12", "312"]