Remove duplicate errors

frontend/sync-client/src/file-operations/file-not-found-error.ts

@@ -1,9 +0,0 @@
-export class FileNotFoundError extends Error {
-    public constructor(
-        message: string,
-        public readonly filePath: string
-    ) {
-        super(message);
-        this.name = "FileNotFoundError";
-    }
-}

frontend/sync-client/src/services/authentication-error.ts

@@ -1,6 +0,0 @@
-export class AuthenticationError extends Error {
-    public constructor(message: string) {
-        super(message);
-        this.name = "AuthenticationError";
-    }
-}

frontend/sync-client/src/services/server-version-mismatch-error.ts

@@ -1,6 +0,0 @@
-export class ServerVersionMismatchError extends Error {
-    public constructor(message: string) {
-        super(message);
-        this.name = "ServerVersionMismatchError";
-    }
-}

frontend/sync-client/src/services/sync-reset-error.ts

@@ -1,6 +0,0 @@
-export class SyncResetError extends Error {
-    public constructor() {
-        super("SyncClient has been reset, cleaning up");
-        this.name = "SyncResetError";
-    }
-}

frontend/sync-client/src/sync-operations/cursor-tracker.ts

@@ -142,7 +142,7 @@ export class CursorTracker {
             const record = this.database.getLatestDocumentByRelativePath(
                 doc.relative_path
             );
-            if (record?.metadata?.hash !== hash(readContent)) {
+            if (record?.metadata?.hash !== (await hash(readContent))) {
                 doc.vault_update_id = null;
             }
         }
@@ -255,7 +255,7 @@ export class CursorTracker {
 
         return this.database.getLatestDocumentByRelativePath(
             document.relative_path
-        )?.metadata?.hash === hash(currentContent)
+        )?.metadata?.hash === (await hash(currentContent))
             ? DocumentUpToDateness.UpToDate
             : DocumentUpToDateness.Prior;
     }