ci: drop the DB docs generation since it's unused (#2389)

Author: jdobes

.github/workflows/db-docs.yml

@@ -18,7 +18,7 @@
       "enabled": false
     },
     {
-      "matchFileNames": ["**/requirements*.txt", "Dockerfile.test", "Dockerfile.dbdocs", "**/grafana/Dockerfile", "**/platform_mock/Dockerfile"],
+      "matchFileNames": ["**/requirements*.txt", "Dockerfile.test", "**/grafana/Dockerfile", "**/platform_mock/Dockerfile"],
       "enabled": false
     },
     {