Disable throwing errors on dynamic dep fetch 404 (codesandbox#579)

Author: CompuIves

packages/app/src/sandbox/eval/manager.js

@@ -475,7 +475,6 @@ export default class Manager {
         this.manifest.dependencies.find(d => d.name === dependencyName) ||
         this.manifest.dependencyDependencies[dependencyName]
       ) {
-        this.downloadDependency(connectedPath, currentPath);
         throw new ModuleNotFoundError(connectedPath, true);
       } else {
         throw new DependencyNotFoundError(connectedPath);

packages/app/src/sandbox/eval/npm/fetch-npm-module.js

@@ -191,7 +191,9 @@ function resolvePath(
       },
       (err, resolvedPath) => {
         if (err) {
-          console.error(err);
+          if (process.env.NODE_ENV === 'development') {
+            console.error(err);
+          }
           return reject(err);
         }