[asterisk-dev] Remove ast_app_getvoice

[Kevin P. Fleming]

Andrey S. Pankov wrote:

> Why not remove ast_app_getvoice from app.h and app.c?
> It's not used anywhere and it's implementation is not good enough.
> app_waitforsilence and app_amd are using their own routines anyway.

It does not appear that it has ever been used, even the patch that added
it in 2003 did not include any users. It's been removed.