Remove welcomeProjectManager cleanup code

[albertxing]

Refers to issue #2823

• Passes all unit tests
• Passes ProjectManager integration test

Searched through all occurrences of "welcomeProjectsFixed" and found only the two local values.

[albertxing]

Out of context now.

[TomMalbran]

@albertxing Next time you try and pull this fix, check into making a branch for each pull request instead of requesting directly from master, since branches don't need much maintenance unless there are merge issues, will only have your commits, and are a lot easier to handle multiple pull requests.

[albertxing]

Hi, thanks for the suggestion.
Do you have a bit of time to look over the two commits and see if they are sufficient for this issue?

I'm still quite new to large projects.

[TomMalbran]

Yes, your commit is enough to fix this issue (the second one). The other commit, shouldn't be added on your next pull request, but that is fixed having the local repository up to date with the github repository and then creating a branch from it.

Check the wiki if you need more information, specially: https://github.com/adobe/brackets/wiki/How-to-Hack-on-Brackets

[albertxing]

Thanks, I was wondering why peterflynn's commit showed up. I'll be more careful.