Remove functions deprecated before 0.41

Commits showing when each function was deprecated.

https://github.com/adobe/brackets/commit/a9ab07c38e2175c46bccaa3c5ad8fb3e331b7499

https://github.com/adobe/brackets/commit/0c0218454c5dfea62ced4f3ec75de34bee13930c

https://github.com/adobe/brackets/commit/d2a8a827454efe4e692fa17730e36649cb19a1dd

https://github.com/adobe/brackets/commit/04b015e9d18a44b1f27c889c12d36b8abacc06cc
Merge remote-tracking branch 'upstream/master' into remove-some-deprecated
Remove unused references
Remove spy attached to getStyleSheetFromBrowser()
Removed unneeded code
Merge pull request #8992 from le717/remove-some-deprecated

Remove individual functions deprecated before 0.41