diff --git a/utils/shared-ot.ts b/utils/shared-ot.ts
deleted file mode 100644
index a1b4c33e..00000000
--- a/utils/shared-ot.ts
+++ /dev/null
@@ -1,37 +0,0 @@
-import { diff_match_patch } from "diff-match-patch";
-import { insert, remove, TextOp } from "ot-text-unicode";
-
-export interface TextOperationSet {
-  version: number;
-  operations: TextOp;
-}
-
-export interface TextOperationSetWithCursor extends TextOperationSet {
-  cursor?: number;
-}
-
-export function createTextOpFromTexts(
-  prevText: string,
-  currentText: string
-): TextOp {
-  const dmp = new diff_match_patch();
-  const diffs = dmp.diff_main(prevText, currentText);
-  //dmp.diff_cleanupSemantic(diffs);
-
-  var textop: TextOp = [];
-
-  var skipn: number = 0;
-
-  for (const [operation, text] of diffs) {
-    if (operation === 0) {
-      skipn += text.length;
-    } else if (operation === -1) {
-      textop = [...textop, ...remove(skipn, text)];
-      skipn = 0;
-    } else {
-      textop = [...textop, ...insert(skipn, text)];
-      skipn = 0;
-    }
-  }
-  return textop;
-}