Unneeded dev dependencies should be removed after postclone.js finishes

[adrian-niculescu]

Which platform(s) does your issue occur on?

• All

Please, provide the following version numbers that your issue occurs with:

• CLI: 5.3.3

Please, tell us how to recreate the issue in as much detail as possible.

After the postclone.js script finishes executing when the user runs npm run postclone there are some dev dependencies in src/package.json that are not used after this point. These are prompt and rimraf.
These should be removed by automatically by executing npm remove prompt rimraf in the finishSetup() function for example.
It goes without saying that unneeded dependencies increase the time npm install takes to execute and little by little the build takes minutes instead of seconds.

[EddyVerbruggen]

Those are devDependencies actually, so they should not end up in the final package on npm at all.

[adrian-niculescu]

As I said, they increase the timenpm install takes to execute.

[EddyVerbruggen]

Feel free to send a PR, I'm sure someone will be happy to merge it 👍