[IMPR] Simplify takesettings

• set self.settingsData to None on top of the method. It is no longer necessary to set them to None later except we got an empty list.
• remove inner try/exeption and use page.text property which catch the NoPage exception and returns an empty string instead.
• return after a wrong setting message has been printed.
• remove comment which repeats the printed message.

Change-Id: Ia37362980d35cf26d4bccf35e1731e79f76eaeef