Mark two removed pre-meal strings stale in the catalog (#2500)

"Until I enter carbs" and "Use Pre-Meal Preset" are no longer referenced
anywhere in source, so Xcode marks them stale on extraction. Their
existing translations are left in place; only the marker is added.

Build-regenerated; no hand edits.

Author: ps2

Loop/Localizable.xcstrings

@@ -40331,6 +40331,7 @@
     },
     "Until I enter carbs" : {
       "comment" : "The title of a target alert action specifying pre-meal targets duration for 1 hour or until the user enters carbs (whichever comes first).",
+      "extractionState" : "stale",
       "localizations" : {
         "da" : {
           "stringUnit" : {
@@ -40607,6 +40608,7 @@
     },
     "Use Pre-Meal Preset" : {
       "comment" : "The title of the alert controller used to select a duration for pre-meal targets",
+      "extractionState" : "stale",
       "localizations" : {
         "da" : {
           "stringUnit" : {