diff --git a/src/common/TypedArrayUtils.test.ts b/src/common/TypedArrayUtils.test.ts
deleted file mode 100644
index 6390854b..00000000
--- a/src/common/TypedArrayUtils.test.ts
+++ /dev/null
@@ -1,24 +0,0 @@
-/**
- * Copyright (c) 2018 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-import { assert } from 'chai';
-import { concat } from 'common/TypedArrayUtils';
-
-type TypedArray = Uint8Array | Uint16Array | Uint32Array | Uint8ClampedArray | Int8Array | Int16Array | Int32Array | Float32Array | Float64Array;
-
-function deepEquals(a: TypedArray, b: TypedArray): void {
-  assert.equal(a.length, b.length);
-  for (let i = 0; i < a.length; ++i) {
-    assert.equal(a[i], b[i]);
-  }
-}
-
-describe('typed array convenience functions', () => {
-  it('concat', () => {
-    const a = new Uint8Array([1, 2, 3, 4, 5]);
-    const b = new Uint8Array([6, 7, 8, 9, 0]);
-    const merged = concat(a, b);
-    deepEquals(merged, new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8, 9, 0]));
-  });
-});
diff --git a/src/common/TypedArrayUtils.ts b/src/common/TypedArrayUtils.ts
deleted file mode 100644
index f3bacd50..00000000
--- a/src/common/TypedArrayUtils.ts
+++ /dev/null
@@ -1,17 +0,0 @@
-/**
- * Copyright (c) 2018 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-export type TypedArray = Uint8Array | Uint16Array | Uint32Array | Uint8ClampedArray | Int8Array | Int16Array | Int32Array | Float32Array | Float64Array;
-
-/**
- * Concat two typed arrays `a` and `b`.
- * Returns a new typed array.
- */
-export function concat<T extends TypedArray>(a: T, b: T): T {
-  const result = new (a.constructor as any)(a.length + b.length);
-  result.set(a);
-  result.set(b, a.length);
-  return result;
-}