diff --git a/packages/types/src/utils/ExecutionAddress.ts b/packages/types/src/utils/ExecutionAddress.ts
deleted file mode 100644
index cd2af4d54dc9..000000000000
--- a/packages/types/src/utils/ExecutionAddress.ts
+++ /dev/null
@@ -1,48 +0,0 @@
-import {keccak256} from "ethereum-cryptography/keccak.js";
-import {ByteVectorType, fromHexString, toHexString} from "@chainsafe/ssz";
-
-export type ByteVector = Uint8Array;
-
-export class ExecutionAddressType extends ByteVectorType {
-  constructor() {
-    super(20, {typeName: "ExecutionAddress"});
-  }
-  toJson(value: ByteVector): unknown {
-    const str = super.toJson(value) as string;
-    return toChecksumAddress(str);
-  }
-}
-
-function isAddressValid(address: string): boolean {
-  return /^(0x)?[0-9a-f]{40}$/i.test(address);
-}
-
-/**
- * Formats an address according to [ERC55](https://eips.ethereum.org/EIPS/eip-55)
- */
-export function toChecksumAddress(address: string): string {
-  if (!isAddressValid(address)) {
-    throw Error(`Invalid address: ${address}`);
-  }
-
-  const rawAddress = address.toLowerCase().startsWith("0x") ? address.slice(2) : address;
-  const chars = rawAddress.split("");
-
-  // Inspired by https://github.com/ethers-io/ethers.js/blob/cac1da1f912c2ae9ba20f25aa51a91766673cd76/src.ts/address/address.ts#L8
-  const expanded = new Uint8Array(chars.length);
-  for (let i = 0; i < expanded.length; i++) {
-    expanded[i] = rawAddress[i].charCodeAt(0);
-  }
-
-  const hashed = keccak256(expanded);
-  for (let i = 0; i < chars.length; i += 2) {
-    if (hashed[i >> 1] >> 4 >= 8) {
-      chars[i] = chars[i].toUpperCase();
-    }
-    if ((hashed[i >> 1] & 0x0f) >= 8) {
-      chars[i + 1] = chars[i + 1].toUpperCase();
-    }
-  }
-
-  return "0x" + chars.join("");
-}
diff --git a/packages/types/src/utils/StringType.ts b/packages/types/src/utils/StringType.ts
deleted file mode 100644
index b3ef4f2f1f18..000000000000
--- a/packages/types/src/utils/StringType.ts
+++ /dev/null
@@ -1,55 +0,0 @@
-import {BasicType} from "@chainsafe/ssz";
-
-export class StringType<T extends string = string> extends BasicType<T> {
-  readonly typeName = "string";
-  byteLength = 0;
-  fixedSize = 0;
-  minSize = 0;
-  maxSize = 0;
-
-  defaultValue(): T {
-    return "" as T;
-  }
-
-  // Serialization + deserialization
-
-  value_serializeToBytes(): number {
-    throw Error("Not supported in String type");
-  }
-  value_deserializeFromBytes(): T {
-    throw Error("Not supported in String type");
-  }
-  tree_serializeToBytes(): number {
-    throw Error("Not supported in String type");
-  }
-  tree_deserializeFromBytes(): never {
-    throw Error("Not supported in String type");
-  }
-
-  // Fast tree opts
-
-  tree_getFromNode(): T {
-    throw Error("Not supported in String type");
-  }
-  tree_setToNode(): void {
-    throw Error("Not supported in String type");
-  }
-  tree_getFromPackedNode(): T {
-    throw Error("Not supported in String type");
-  }
-  tree_setToPackedNode(): void {
-    throw Error("Not supported in String type");
-  }
-
-  // JSON
-
-  fromJson(json: unknown): T {
-    return json as T;
-  }
-
-  toJson(value: T): unknown {
-    return value;
-  }
-}
-
-export const stringType = new StringType();
diff --git a/packages/types/src/utils/executionAddress.ts b/packages/types/src/utils/executionAddress.ts
index cd2af4d54dc9..bfda06dc3579 100644
--- a/packages/types/src/utils/executionAddress.ts
+++ b/packages/types/src/utils/executionAddress.ts
@@ -1,5 +1,5 @@
 import {keccak256} from "ethereum-cryptography/keccak.js";
-import {ByteVectorType, fromHexString, toHexString} from "@chainsafe/ssz";
+import {ByteVectorType} from "@chainsafe/ssz";
 
 export type ByteVector = Uint8Array;