docs: fill in PR number in ERC-4337 removal changelog entries

Author: danroc

packages/keyring-api/CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
-- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#TODO](https://github.com/MetaMask/accounts/pull/TODO))
+- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#588](https://github.com/MetaMask/accounts/pull/588))
   - Removed `EthAccountType.Erc4337` (`eip155:erc4337`) from the `EthAccountType` enum.
   - Removed `EthErc4337AccountStruct` and `EthErc4337Account` types.
   - Removed `EthMethod.PrepareUserOperation`, `EthMethod.PatchUserOperation`, and `EthMethod.SignUserOperation` from the `EthMethod` enum.

packages/keyring-internal-api/CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
-- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#TODO](https://github.com/MetaMask/accounts/pull/TODO))
+- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#588](https://github.com/MetaMask/accounts/pull/588))
   - Removed exported `EthKeyring` type (which held the three ERC-4337 userOperation methods).
   - Removed `InternalEthErc4337AccountStruct` and `InternalEthErc4337Account` types.
   - Removed `EthAccountType.Erc4337` entry from `InternalAccountStructs` and `InternalAccountTypes`.

packages/keyring-sdk/CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
-- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#TODO](https://github.com/MetaMask/accounts/pull/TODO))
+- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#588](https://github.com/MetaMask/accounts/pull/588))
   - Removed `Eth4337Keyring` type from exports.
   - Removed `prepareUserOperation`, `patchUserOperation`, and `signUserOperation` methods from `EthKeyringV1Adapter` and the `BaseEthKeyring` type.
 

packages/keyring-snap-bridge/CHANGELOG.md

@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
-- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#TODO](https://github.com/MetaMask/accounts/pull/TODO))
+- **BREAKING:** Removed ERC-4337 (account abstraction) support ([#588](https://github.com/MetaMask/accounts/pull/588))
   - Removed `prepareUserOperation`, `patchUserOperation`, and `signUserOperation` methods from `SnapKeyring` and `SnapKeyringV1`.
   - Removed ERC-4337 account type handling from `assertKeyringAccount` and the v1 account migration.