Don't use try/catch if exceptions support is disabled.

Closes #15954.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75837 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Don't show "deleted stale lock file" message by default.

The user typically can't do anything about this error anyhow, so don't show it
by default. Still do show it when running in the verbose mode as this might
add diagnosing the problem when something goes unexpectedly wrong.

Closes #15944.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@75839 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775