Redact flume and flume-ng

Both of these have not been updated in some time, despite having upstream
updates.

Closes #24814.
Redact erviz

The homepage is no longer there, and the source code location is unknown.

Closes #24807.
points2grid 1.1.1
SPTK 3.7

    The Speech Signal Processing Toolkit (SPTK) is a suite of speech signal processing tools for UNIX environments.
    e.g., LPC analysis, PARCOR analysis, LSP analysis, PARCOR synthesis filter, and other extended versions of them.
    This software is released under the Modified BSD license.
Merge branch 'master' of https://github.com/Homebrew/homebrew