doc: remove unrelated bitcoin-wallet binary from libbitcoin_ipc description

`bitcoin-wallet` as-is is merely an offline wallet inspection tool
(introduced more than 9 years ago in PR #13926) that doesn't have any
relation with IPC/multiprocess, so remove it from the list of binaries
that use `libbitcoin_ipc`.

Author: theStack

doc/design/libraries.md

@@ -8,7 +8,7 @@
 | *libbitcoin_crypto*      | Hardware-optimized functions for data encryption, hashing, message authentication, and key derivation. |
 | *libbitcoin_kernel*      | Consensus engine and support library used for validation by *libbitcoin_node*. |
 | *libbitcoinqt*           | GUI functionality used by *bitcoin-qt* and *bitcoin-gui* executables. |
-| *libbitcoin_ipc*         | IPC functionality used by *bitcoin-node*, *bitcoin-wallet*, *bitcoin-gui* executables to communicate when [`-DENABLE_IPC=ON`](multiprocess.md) is used. |
+| *libbitcoin_ipc*         | IPC functionality used by *bitcoin-node* and *bitcoin-gui* executables to communicate when [`-DENABLE_IPC=ON`](multiprocess.md) is used. |
 | *libbitcoin_node*        | P2P and RPC server functionality used by *bitcoind* and *bitcoin-qt* executables. |
 | *libbitcoin_util*        | Home for common functionality shared by different executables and libraries. Similar to *libbitcoin_common*, but lower-level (see [Dependencies](#dependencies)). |
 | *libbitcoin_wallet*      | Wallet functionality used by *bitcoind* and *bitcoin-wallet* executables. |