Revert "Add private method docs to DisplayBuffer::outermostFoldsInBufferRange"

This reverts commit b9b3d021cc7197ea4d89b5dbed5321283be065f1.
Revert "Add 'downloading update' menu item"

This reverts commit e8136853db36d7dc239d9b9f554fba46b08834d9.

Conflicts:
	src/browser/application-menu.coffee
	src/browser/atom-application.coffee