As the title says, Necrophos and Clockwerk still have those lines sitting in the game files for ages. They all just need to be hooked up in their respective talker script. The only thing that might need a change is for Clockwerk, as his lines are from his Announcer pack, so they'll have to probably be ported over, similary to what was done when the Death Prophet Announcer was released. Also reminder I made a post about this years back. Valve, pls fix.

Necrophos:

Top is missing.
Middle is missing.
Bottom is missing.

Clockwerk:

Top is missing.
Missing top.
Middle is missing.
Missing middle.
Bottom is missing.
Missing bottom.

While we are at it, a suggestion I also made ages ago is adding in the "Missing lane" voice lines from Announcer packs to heroes that already have them. Doing so is only really needed for some extra varity, similarly to how some heroes either go "Missing top!" or "Top is missing!" The announcer packs that would make use of these are:

The Lina Announcer
The Bristleback Announcer
The Crystal Maiden Announcer
The Monkey King Announcer
The Techies Announcer

Adding these in isn't as important, as those heroes already have lines for calling Missing lanes anyhow, but extra variety never hurt anyone.