Remove some unused translations

assets/translations/en.json

@@ -111,8 +111,6 @@
     "dark": "Dark",
     "light": "Light",
     "followSystem": "Follow System",
-    "obtainium": "Obtainium",
-    "materialYou": "Material You",
     "useBlackTheme": "Use pure black dark theme",
     "appSortBy": "App Sort By",
     "authorName": "Author/Name",
@@ -176,7 +174,6 @@
     "appWithIdOrNameNotFound": "No App was found with that ID or Name",
     "reposHaveMultipleApps": "Repos may contain multiple Apps",
     "fdroidThirdPartyRepo": "F-Droid Third-Party Repo",
-    "steam": "Steam",
     "steamMobile": "Steam Mobile",
     "steamChat": "Steam Chat",
     "install": "Install",
@@ -286,7 +283,6 @@
     "parallelDownloads": "Allow parallel downloads",
     "installMethod": "Installation method",
     "normal": "Normal",
-    "shizuku": "Shizuku",
     "root": "Root",
     "shizukuBinderNotFound": "Сompatible Shizuku service wasn't found",
     "useSystemFont": "Use the system font",