diff --git a/frontend/src/components/users/BehaviourSettingsSection.tsx b/frontend/src/components/users/BehaviourSettingsSection.tsx
index d5208a1..8399a35 100644
--- a/frontend/src/components/users/BehaviourSettingsSection.tsx
+++ b/frontend/src/components/users/BehaviourSettingsSection.tsx
@@ -11,8 +11,7 @@ import type { ClientAnimationMode,
 	      ClientBehaviorSettings,
 	      ClientEmbedAutoLoadMode,
 	      ClientLinkPreloadMode,
-	      ClientTagRelationDisplayMode,
-	      ClientThumbnailMode } from '@/lib/settings'
+	      ClientTagRelationDisplayMode } from '@/lib/settings'
 
 type Props = {
     sectionClassName: string
@@ -31,9 +30,9 @@ type SegmentedControlProps<T extends string> = {
     onChange:  (value: T) => void }
 
 type SettingBlockProps = {
-    title:       string
-    description: string
-    children:    ReactNode }
+    title:        string
+    description?: string
+    children:     ReactNode }
 
 const animationOptions: SegmentedOption<ClientAnimationMode>[] = [
     { value: 'off', label: 'なし' },
@@ -53,12 +52,6 @@ const tagRelationDisplayOptions: SegmentedOption<ClientTagRelationDisplayMode>[]
     { value: 'flat', label: 'まとめない' },
     { value: 'grouped', label: 'まとめる' }]
 
-const thumbnailModeOptions: SegmentedOption<ClientThumbnailMode>[] = [
-    { value: 'off', label: '非表示' },
-    { value: 'light', label: '軽量' },
-    { value: 'normal', label: '通常' }]
-
-
 const SegmentedControl = <T extends string,> (
     { value, options, onChange }: SegmentedControlProps<T>,
 ) => {
diff --git a/frontend/src/pages/theatres/TheatreDetailPage.tsx b/frontend/src/pages/theatres/TheatreDetailPage.tsx
index 2a99a9f..43a7e8b 100644
--- a/frontend/src/pages/theatres/TheatreDetailPage.tsx
+++ b/frontend/src/pages/theatres/TheatreDetailPage.tsx
@@ -57,8 +57,6 @@ const INITIAL_THEATRE_INFO: TheatreInfo =
 const INITIAL_WEIGHTS: TheatrePostSelectionWeights =
     { tagPenalties: [], lightestPosts: [], heaviestPosts: [] }
 
-const LAYOUT_STORAGE_KEY = 'theatre-layout-mode'
-const TAG_FLOW_STORAGE_KEY = 'theatre-tag-flow'
 const MIN_MAIN_WIDTH = 360
 const SIDEBAR_GAP_WIDTH = 16
 
diff --git a/frontend/src/pages/users/SettingPage.tsx b/frontend/src/pages/users/SettingPage.tsx
index fa809e4..a72b6ab 100644
--- a/frontend/src/pages/users/SettingPage.tsx
+++ b/frontend/src/pages/users/SettingPage.tsx
@@ -168,24 +168,7 @@ const themeTokenGroups: ThemeTokenGroupSpec[] = [
       fields: [
 	  { key: 'background', label: '背景' },
 	  { key: 'foreground', label: '文字' },
-	  { key: 'primary', label: '主色' },
-	  { key: 'accent', label: 'アクセント' },
-	  { key: 'link', label: 'リンク' },
-      ] },
-    { title: '面',
-      fields: [
-	  { key: 'card', label: 'カード' },
-	  { key: 'muted', label: '薄い背景' },
-	  { key: 'border', label: '境界線' },
-      ] },
-    { title: '上部ナビ',
-      fields: [
-	  { key: 'topNavRootBackgroundMobile', label: 'スマホ背景' },
-	  { key: 'topNavRootBackgroundDesktop', label: 'PC 背景' },
-	  { key: 'topNavActiveBackground', label: '選択中背景' },
-	  { key: 'topNavBrandLink', label: 'ロゴ色' },
-      ] },
-]
+	  { key: 'link', label: 'リンク' }] }]
 
 
 const ThemeSegmentedControl = <T extends string | number,> (
@@ -498,8 +481,6 @@ const ThemeSection: FC<ThemeSectionProps> = (
       draftActiveDarkThemeSlotNo,
       currentDisplayedThemeSlot,
       selectedTheme,
-      displayedThemeLabel,
-      systemThemeLabel,
       hasUnsavedChanges,
       settingsBaseErrors,
       settingsFieldErrors,