extensions: Remove horizontal-workspaces extension

Workspaces are now horizontal by default, so we don't need to change
the layout for classic mode anymore.

That was the only reason why the extension was added, so it has now
outlived its usefulness.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/merge_requests/158>

extensions/horizontal-workspaces/extension.js

@@ -1,38 +0,0 @@
-/* exported init */
-const { Meta } = imports.gi;
-
-const { ThumbnailsBox } = imports.ui.workspaceThumbnail;
-
-class Extension {
-    constructor() {
-        this._origUpdateSwitcherVisibility =
-            ThumbnailsBox.prototype._updateSwitcherVisibility;
-    }
-
-    enable() {
-        global.workspace_manager.override_workspace_layout(
-            Meta.DisplayCorner.TOPLEFT,
-            false,
-            1,
-            -1);
-
-        ThumbnailsBox.prototype._updateSwitcherVisibility = function () {
-            this.hide();
-        };
-    }
-
-    disable() {
-        global.workspace_manager.override_workspace_layout(
-            Meta.DisplayCorner.TOPLEFT,
-            false,
-            -1,
-            1);
-
-        ThumbnailsBox.prototype._updateSwitcherVisibility =
-            this._origUpdateSwitcherVisibility;
-    }
-}
-
-function init() {
-    return new Extension();
-}

extensions/horizontal-workspaces/meson.build

@@ -1,5 +0,0 @@
-extension_data += configure_file(
-  input: metadata_name + '.in',
-  output: metadata_name,
-  configuration: metadata_conf
-)

extensions/horizontal-workspaces/metadata.json.in

@@ -1,10 +0,0 @@
-{
-"extension-id": "@extension_id@",
-"uuid": "@uuid@",
-"settings-schema": "@gschemaname@",
-"gettext-domain": "@gettext_domain@",
-"name": "Horizontal workspaces",
-"description": "Use a horizontal workspace layout",
-"shell-version": [ "@shell_current@" ],
-"url": "@url@"
-}

extensions/horizontal-workspaces/stylesheet.css

@@ -1 +0,0 @@
-/* This extensions requires no special styling */

meson.build

@@ -32,7 +32,6 @@ uuid_suffix = '@gnome-shell-extensions.gcampax.github.com'
 
 classic_extensions = [
   'apps-menu',
-  'horizontal-workspaces',
   'places-menu',
   'launch-new-instance',
   'window-list'