Remove mention about Exherbo from README

Now the package is included in the badge (Repology).

Signed-off-by: JoeLametta <JoeLametta@users.noreply.github.com>

README.md

@@ -116,8 +116,6 @@ This is a noncomprehensive summary which shows whipper's packaging status (unoff
 
 [![Packaging status](https://repology.org/badge/vertical-allrepos/whipper.svg)](https://repology.org/metapackage/whipper)
 
-- There's a [whipper package available for Exherbo](https://git.exherbo.org/summer/packages/media-sound/whipper/index.html).
-
 **NOTE:** if installing whipper from an unofficial repository please keep in mind it is your responsibility to verify that the provided content is safe to use.
 
 ## Building