Remove database versions. Not required here

Author: desrosj

.github/workflows/upgrade-testing.yml

@@ -36,14 +36,6 @@ env:
     { "php": "7.3","db-version": "8.4" },
     { "php": "7.2","db-version": "9.4" },
     { "php": "7.3","db-version": "9.4" },
-    { "db-version": "5.0" },
-    { "db-version": "5.1" },
-    { "db-version": "5.5" },
-    { "db-version": "9.0" },
-    { "db-version": "9.1" },
-    { "db-version": "9.2" },
-    { "db-version": "9.3" },
-    { "db-version": "9.4" },
   ]'
 
 # Cancels all previous workflow runs for pull requests that have not completed.