rosenthal: Remove sidebery-icecat.

* modules/rosenthal/packages/binaries.scm (sidebery, sidebery/icecat): Delete
variables.

modules/rosenthal/packages/binaries.scm

@@ -277,35 +277,6 @@ monster-in-the-middle}.")
     (license license:expat)
     (properties '((upstream-name . "shadow-tls")))))
 
-(define sidebery
-  (package
-    (name "sidebery")
-    (version "5.3.3.7")
-    (source
-     (origin
-       (method url-fetch/zipbomb)
-       (uri (string-append
-             "https://github.com/mbnuqw/sidebery/releases/download/v"
-             (string-drop-right version 2) "/sidebery-" version ".xpi"))
-       (sha256
-        (base32
-         "0srply73aa3i353w8d6zlqn55wqb2ndmcmzzr4n3dsxr5hynpypx"))))
-    (build-system copy-build-system)
-    (arguments
-     (list
-      #:install-plan
-      #~'(("." #$(assq-ref (package-properties this-package) 'addon-id)))))
-    (home-page "https://github.com/mbnuqw/sidebery")
-    (synopsis "Manage tabs and bookmarks in sidebar")
-    (description
-     "This package provides a browser extension for managing tabs and bookmarks
-in sidebar.")
-    (license license:expat)
-    (properties '((addon-id . "{3c078156-979c-498b-8990-85f7987dd929}")))))
-
-(define-public sidebery/icecat
-  (make-icecat-extension sidebery))
-
 (define-public sing-box-bin
   (deprecated-package "sing-box-bin" sing-box))