diff --git a/src/util/util/extensions/Array.test.ts b/src/util/util/extensions/Array.test.ts
index faabfdeab..432e9a590 100644
--- a/src/util/util/extensions/Array.test.ts
+++ b/src/util/util/extensions/Array.test.ts
@@ -64,14 +64,4 @@ describe("Array extensions", () => {
 			[],
 		);
 	});
-
-	it("intersect", () => {
-		const arr1 = [1, 2, 3, 4];
-		const arr2 = [3, 4, 5, 6];
-		assert.deepEqual(arr1.intersect(arr2), [3, 4]);
-		assert.deepEqual(arr1.intersect([]), []);
-		// eslint-disable-next-line @typescript-eslint/ban-ts-comment
-		// @ts-expect-error
-		assert.deepEqual([].intersect(arr2), []);
-	});
 });
diff --git a/src/util/util/extensions/Array.ts b/src/util/util/extensions/Array.ts
index 11d939207..eec76a0fb 100644
--- a/src/util/util/extensions/Array.ts
+++ b/src/util/util/extensions/Array.ts
@@ -25,7 +25,6 @@ declare global {
 		remove(item: T): void;
 		distinct(): T[];
 		distinctBy<K>(key: (elem: T) => K): T[];
-		intersect(other: T[]): T[];
 	}
 }
 
@@ -117,7 +116,3 @@ if (!Array.prototype.distinctBy)
 	Array.prototype.distinctBy = function <T, K>(this: T[], key: (elem: T) => K) {
 		return arrayDistinctBy.call(this, key as (elem: unknown) => unknown);
 	};
-if (!Array.prototype.intersect)
-	Array.prototype.intersect = function <T>(this: T[], other: T[]) {
-		return arrayIntersect.call(this, other);
-	};