This removes all uses of `Declaration.getQualifiedName` that I think can
be removed without changing any behaviour. The following uses in the
LGTM default suite remain:
* `cpp/ql/src/Security/CWE/CWE-121/UnterminatedVarargsCall.ql` (in `select`).
* `cpp/ql/src/semmle/code/cpp/dataflow/internal/DataFlowDispatch.qll` (needs template args).
* `cpp/ql/src/semmle/code/cpp/security/FunctionWithWrappers.qll` (used for alert messages).
The configuration in `DefaultOptions.qll` assumed that a call to any
top-level function named `error` would exit the program. This is not
true.
The assumption was probably about `error(3)`, which is a GNU extension.
It only exits if its first argument it not 0. Furthermore, projects such
as openssh may define their own function named `error` with different
behaviour. Because the GNU `error` function is non-standard, it's
perfectly fine to shadow it with a project-specific definition.
This change removes two FPs from `PointlessComparison.qll` on
https://github.com/openssh/openssh-portable.
