Partially revert 79efcaa

which accidentally added erlang 24 to the mixed version testing on
this branch, and should not have

Author: HoloRin

.github/workflows/test-mixed-versions.yaml

@@ -31,7 +31,6 @@ jobs:
       matrix:
         erlang_version:
         - "23"
-        - "24"
     timeout-minutes: 120
     steps:
     - name: CHECKOUT REPOSITORY
@@ -73,7 +72,6 @@ jobs:
       matrix:
         erlang_version:
         - "23"
-        - "24"
     timeout-minutes: 60
     steps:
     - name: CHECKOUT REPOSITORY