pandoc 1.13

Also remove outdated bash completion.
pandoc: update 1.13 bottle.

Closes #31657.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
the_silver_searcher 0.24.1
the_silver_searcher: update 0.24.1 bottle.

Closes #31658.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
enca 1.15
enca: add 1.15 bottle.

Closes #31646.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>