Revert "aspell: store dictionaries in buffer local variable "aspell_dict""

This reverts commit 8b61a55764.

The local variable in buffers introduced new display bugs and would need
some extra code and optimizations to fix.
This will be reintroduced after the release of version 0.4.0.

ChangeLog

@@ -66,7 +66,6 @@ Version 0.4.0 (under dev!)
   hook_connect (task #11205)
 * alias: give higher priority to aliases (2000) so that they take precedence
   over an existing command
-* aspell: store dictionaries in buffer local variable "aspell_dict"
 * aspell: ignore self and remote nicks in private buffers
 * aspell: add signal "aspell_suggest" (sent when new suggestions are displayed)
 * aspell: add bar items "aspell_dict" (dictionary used on current buffer) and

src/plugins/aspell/weechat-aspell-bar-item.c

@@ -50,8 +50,7 @@ weechat_aspell_bar_item_dict (void *data, struct t_gui_bar_item *item,
     buffer = weechat_window_get_pointer (window, "buffer");
     if (buffer)
     {
-        dict_list = weechat_buffer_get_string (buffer,
-                                               "localvar_aspell_dict");
+        dict_list = weechat_aspell_get_dict (buffer);
         if (dict_list)
             return strdup (dict_list);
     }

src/plugins/aspell/weechat-aspell.c

@@ -362,10 +362,7 @@ weechat_aspell_create_spellers (struct t_gui_buffer *buffer)
                 }
                 weechat_string_free_split (argv);
             }
-            weechat_buffer_set (buffer, "localvar_set_aspell_dict", dict_list);
         }
-        else
-            weechat_buffer_set (buffer, "localvar_del_aspell_dict", "");
         weechat_bar_item_update ("aspell_dict");
     }
 }