fix(ui): remove unused lint leftovers

packages/ui/src/components/views/git/GitHeader.tsx

@@ -24,7 +24,6 @@ import { BranchSelector } from './BranchSelector';
 import { WorktreeBranchDisplay } from './WorktreeBranchDisplay';
 import { SyncActions } from './SyncActions';
 import type { GitStatus, GitIdentityProfile, GitRemote } from '@/lib/api/types';
-import { useUIStore } from '@/stores/useUIStore';
 import { useI18n } from '@/lib/i18n';
 
 type SyncAction = 'fetch' | 'pull' | 'push' | null;
@@ -211,14 +210,10 @@ export const GitHeader: React.FC<GitHeaderProps> = ({
   onOpenHistory,
 }) => {
   const { t } = useI18n();
-  const isMobile = useUIStore((state) => state.isMobile);
-
   if (!status) {
     return null;
   }
 
-  const useTwoRowHeader = isMobile;
-
   const managementButtons = (
     <div className="flex items-center gap-1 shrink-0">
       {onOpenHistory ? (