chore: remove legacy Redux migration

src/mobx/stores/Settings.ts

@@ -2,18 +2,9 @@ import { action, computed, makeAutoObservable, ObservableMap } from "mobx";
 
 import { mapToRecord } from "../../lib/conversion";
 
-import {
-    LegacyAppearanceOptions,
-    legacyMigrateAppearance,
-    legacyMigrateTheme,
-    LegacyTheme,
-    LegacyThemeOptions,
-} from "../legacy/redux";
-
 import { Fonts, MonospaceFonts, Overrides } from "../../context/Theme";
 
 import { EmojiPack } from "../../components/common/Emoji";
-
 import { MIGRATIONS } from "../State";
 import Persistent from "../interfaces/Persistent";
 import Store from "../interfaces/Store";
@@ -129,16 +120,8 @@ export default class Settings
     @action apply(
         key: "appearance" | "theme",
         data: unknown,
-        revision: number,
+        _revision: number,
     ) {
-        if (revision < MIGRATIONS.REDUX) {
-            if (key === "appearance") {
-                data = legacyMigrateAppearance(data as LegacyAppearanceOptions);
-            } else {
-                data = legacyMigrateTheme(data as LegacyThemeOptions);
-            }
-        }
-
         if (key === "appearance") {
             this.remove("appearance:emoji");
             this.remove("appearance:seasonal");