C++: Fix a typo in template declaration parser function

This is an obvious typo considering the checks at the beginning of the function.

Change-Id: I11b784153b650b02bba7bb942ca1131447a3da4a
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>
C++: Remove dead code in the parser

CPlusPlus::Parser::parseAccessSpecifier() is not used anywhere
throughout the QtCreator codebase.

Change-Id: I062a4ae257b9c61f02bf85079feb6d48bd07c49e
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>