Revert "Fix renaming of symbols for libvlccore"

This reverts commit e2963160.

src/libvlccore.sym

@@ -221,8 +221,6 @@ input_Stop
 input_vaControl
 input_Close
 intf_Create
-libvlc_dialog_provider_init
-libvlc_dialog_provider_deinit
 libvlc_InternalAddIntf
 libvlc_InternalPlay
 libvlc_InternalCleanup
@@ -527,6 +525,8 @@ vlc_dialog_id_post_action
 vlc_dialog_id_post_login
 vlc_dialog_id_set_context
 vlc_dialog_is_cancelled
+vlc_dialog_provider_new
+vlc_dialog_provider_release
 vlc_dialog_provider_set_callbacks
 vlc_dialog_provider_set_ext_callback
 vlc_dialog_release