Upon second-thought (following r274144), remove spurious (unused)
line-noise (libdialog never lived in lib/ -- but rather the noise
came from translating a comment that was introduced 16 years ago
via r40306; translation from comment to code occurred via r267511).

MFC after:	3 days
Reviewed by:	ngie
X-MFC-to:	stable/10


git-svn-id: svn+ssh://svn.freebsd.org/base/head@274159 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f