Remove :emacs imenu module

Some of it was moved into core as reasonable defaults, but the rest of
it doesn't warrant a whole module dedicated to it.

modules/emacs/imenu/config.el

@@ -1,13 +0,0 @@
-;;; emacs/imenu/config.el -*- lexical-binding: t; -*-
-
-;; `imenu-anywhere'
-(setq imenu-anywhere-delimiter ": ")
-
-(add-hook 'imenu-after-jump-hook #'better-jumper-set-jump)
-
-
-(after! imenu-list
-  (setq imenu-list-idle-update-delay 0.5)
-
-  (set-popup-rule! "^\\*Ilist"
-    :side 'right :size 35 :quit nil :select nil :ttl 0))

modules/emacs/imenu/packages.el

@@ -1,5 +0,0 @@
-;; -*- no-byte-compile: t; -*-
-;;; emacs/imenu/packages.el
-
-(package! imenu-anywhere)
-(package! imenu-list)