[oni-core] Put the call to ‘consult-customize’ in separate function

I'm having some issues with my ‘consult-buffer’ setup and I'm hoping that
putting this in its own function will help me debug the issue, or at least show
me if this is part of the issue or not.

oni-core.el

@@ -4,7 +4,7 @@
 
 ;; Author: Tom Willemse <tom@ryuslash.org>
 ;; Keywords: local
-;; Version: 2023.0509.234254
+;; Version: 2023.0524.235720
 ;; Package-Requires: (oni-data-dir oni-embrace oni-hydra expand-region multiple-cursors gcmh diminish ws-butler which-key insert-char-preview mixed-pitch ace-window vertico marginalia orderless consult embark docstr mini-frame)
 
 ;; This program is free software; you can redistribute it and/or modify
@@ -450,11 +450,14 @@ _s_: String list"
     :enabled buffer-file-name
     :action find-file))
 
+(defun oni-core-remove-consult-buffer-preview ()
+  (consult-customize consult-buffer :preview-key nil))
+
 (with-eval-after-load 'consult
   (with-eval-after-load 'related-files
     (add-to-list 'consult-buffer-sources 'oni-core-related-places-source))
 
-  (consult-customize consult-buffer :preview-key nil))
+  (oni-core-remove-consult-buffer-preview))
 
 ;;; Embark