remove unused variable

lib/data/immich/immich_service.dart

@@ -93,34 +93,29 @@ class ImmichService {
       final fileStat = await imageFile.stat();
       final fileCreatedAt = fileStat.changed;
       final fileModifiedAt = fileStat.modified;
-      
+
       // Determine MIME type from file extension
-      String mimeType = 'image/jpeg'; // default
       final extension = fileName.split('.').last.toLowerCase();
       switch (extension) {
         case 'png':
-          mimeType = 'image/png';
           break;
         case 'jpg':
         case 'jpeg':
-          mimeType = 'image/jpeg';
           break;
         case 'gif':
-          mimeType = 'image/gif';
           break;
         case 'webp':
-          mimeType = 'image/webp';
           break;
         case 'heic':
         case 'heif':
-          mimeType = 'image/heic';
           break;
       }
-      
+
       // Generate device IDs (required by Immich API)
       // Using a consistent device ID based on the app
       const deviceId = 'flutter-app-boilerplate';
-      final deviceAssetId = 'device-asset-${fileCreatedAt.millisecondsSinceEpoch}';
+      final deviceAssetId =
+          'device-asset-${fileCreatedAt.millisecondsSinceEpoch}';
 
       // Format dates in ISO 8601 format (UTC)
       final fileCreatedAtIso = fileCreatedAt.toUtc().toIso8601String();
@@ -211,7 +206,8 @@ class ImmichService {
             ? (response.data as Map)['message']?.toString() ??
                 response.statusMessage
             : response.statusMessage;
-        debugPrint('Upload failed with status ${response.statusCode}: $errorMessage');
+        debugPrint(
+            'Upload failed with status ${response.statusCode}: $errorMessage');
         throw ImmichException(
           'Upload failed: $errorMessage',
           response.statusCode,
@@ -223,7 +219,8 @@ class ImmichService {
         debugPrint('Response is Map with keys: ${(response.data as Map).keys}');
         debugPrint('Full response map: ${response.data}');
       } else if (response.data is List) {
-        debugPrint('Response is List with ${(response.data as List).length} items');
+        debugPrint(
+            'Response is List with ${(response.data as List).length} items');
         debugPrint('First item: ${(response.data as List).first}');
       } else {
         debugPrint('Response type: ${response.data.runtimeType}');