Remove duplicate entry for d_b_prebuilt_workspace

Author: Andrew Farries

components/gitpod-db/src/tables.ts

@@ -132,11 +132,6 @@ export class GitpodTableDescriptionProvider implements TableDescriptionProvider
             primaryKeys: ["domain"],
             timeColumn: "_lastModified",
         },
-        {
-            name: "d_b_prebuilt_workspace",
-            primaryKeys: ["id"],
-            timeColumn: "_lastModified",
-        },
         {
             name: "d_b_app_installation",
             primaryKeys: ["platform", "installationID", "state"],