Revert "Preferences: enable interface translation by default, not just tooltips."

This reverts commit c1762b1a08, as this was
intentional since interface translations are often incomplete or use unusual
terms.

source/blender/blenloader/intern/versioning_defaults.c

@@ -104,9 +104,6 @@ void BLO_update_defaults_userpref_blend(void)
 	/* Auto perspective. */
 	U.uiflag |= USER_AUTOPERSP;
 
-	/* Translate both tooltips and interface. */
-	U.transopts |= USER_TR_TOOLTIPS | USER_TR_IFACE;
-
 	/* Init weight paint range. */
 	BKE_colorband_init(&U.coba_weight, true);