This FileStorageMetadata struct appears unused (#29003)

Seems to have been replaced with a Json struct.

GitOrigin-RevId: 78dfd40f5111f5b0e0bf3c3d5c8cdc3fe9b50927

crates/file_storage/src/lib.rs

@@ -14,7 +14,6 @@ use headers::{
     ContentRange,
     ContentType,
 };
-use model::file_storage::types::StorageUuid;
 use storage::Storage;
 
 mod core;
@@ -48,10 +47,3 @@ pub struct TransactionalFileStorage<RT: Runtime> {
     storage: Arc<dyn Storage>,
     convex_origin: ConvexOrigin,
 }
-
-pub struct FileMetadata {
-    pub storage_id: StorageUuid,
-    pub sha256: Sha256Digest,
-    pub size: i64,
-    pub content_type: Option<String>,
-}