chore(template): remove dead viewports-manager/diagnostics setups (unused post-A2)

Author: agviegas

src/cli/templates/app/src/setups/diagnostics.ts

@@ -1,10 +1,8 @@
 export * from "./ui-manager";
-export * from "./viewports-manager";
 export * from "./cloud-runner";
 export * from "./properties-panel";
 export * from "./fps-indicator";
 export * from "./active-tool-hud";
-export * from "./diagnostics";
 export * from "./files-panel";
 export * from "./model-tree";
 export * from "./right-sidebar";