[arch-general] Removal of php-pear, what provides functionality

[Sebastiaan Lokhorst]

There is no change in PEAR upstream. It has not been deprecated nor is it
included with PHP.
Instead, the maintainer of the Arch Linux package decided to no longer
package it.[1]

Are you sure your GroupWare app needs PEAR? PEAR is usually only used to
install dependencies, which can also be done in some other way.

[1] https://pierre-schmitz.com/php-7-on-arch-linux/