Revert "C++: Fix highlighting for lines with predefined macros"

This takes too much memory. For qtcreator.pro the numbers are as
follows:

    Patch applied:  ~ 1600MB (RES)
    Patch reverted: ~  510MB (RES)

This reverts commit 4c2daa90ce558c3b4287edc97127471486a411d9.

Task-number: QTCREATORBUG-10973
Change-Id: I843bd7c1ea4a26a1ec55ddc14c2a34a98d040922
Reviewed-by: hjk <hjk121@nokiamail.com>
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Reviewed-by: Erik Verbruggen <erik.verbruggen@digia.com>