Remove vitamin deficiency effects on load (#49265)

After #49083, effects will no longer be applied for most vitamin
deficiencies... or lost when no longer valid. Since they don't do
anything, let's remove them on load and not leave saves with an effect
that does nothing sticking around.

src/savegame_json.cpp

@@ -3361,6 +3361,19 @@ void Creature::load( const JsonObject &jsin )
     } else {
         jsin.read( "effects", *effects );
     }
+
+    // Remove legacy vitamin effects - they don't do anything, and can't be removed
+    // Remove this code whenever they actually do anything (0.F or later)
+    std::set<efftype_id> blacklisted = {
+        efftype_id( "hypocalcemia" ),
+        efftype_id( "hypovitA" ),
+        efftype_id( "hypovitB" ),
+        efftype_id( "scurvy" )
+    };
+    for( const efftype_id &remove : blacklisted ) {
+        remove_effect( remove );
+    }
+
     jsin.read( "values", values );
 
     jsin.read( "damage_over_time_map", damage_over_time_map );