Remove currentpage.md variables

As part of the Redocly migration, I'm removing syntax that isn't
compatible with the new portal. In many of these cases, the existing
if/else statements weren't working as intended anyway because they
hadn't been updated after the files had been renamed.

In the case of the Client Libraries page, I've removed mention of
editing the page to contribute client libraries for now; when someone
adds guidelines (issue #2266) it would make sense to add a link to those
guidelines in that place instead.

content/_snippets/data_types/address.ja.md

@@ -10,6 +10,3 @@ XRP Ledgerのアカウントは、XRP Ledgerの[base58][]フォーマットの
 >
 > XRP Ledgerプロトコルは「クラシック」アドレスのみをネイティブにサポートしていますが、多くの[クライアントライブラリ](client-libraries.html)はXアドレスもサポートしています。
 
-{% if currentpage.md != "addresses.ja.md" %}
-詳しくは、[アカウント](accounts.html)と[base58エンコード](base58-encodings.html)をご覧ください。
-{% endif %}

content/_snippets/data_types/address.md

@@ -9,7 +9,3 @@ Accounts in the XRP Ledger are identified by an address in the XRP Ledger's [bas
 > **Note:** There is also an **X**-address format that "packs" a [destination tag](source-and-destination-tags.html) into the address. These addresses start with an `X` (for Mainnet) or a `T` (for [test networks](parallel-networks.html)). Exchanges and wallets can use X-addresses to represent all the data a customer needs to know in one value. For more information, see the [X-address format site](https://xrpaddress.info/) and [codec](https://github.com/xrp-community/xrpl-tagged-address-codec).
 >
 > The XRP Ledger protocol only supports "classic" addresses natively, but many [client libraries](client-libraries.html) support X-addresses too.
-
-{% if currentpage.md != "addresses.md" %}
-For more information, see [Accounts](accounts.html) and [base58 Encodings](base58-encodings.html).
-{% endif %}

content/_snippets/post-rippled-install.ja.md

@@ -4,12 +4,9 @@
 
 `rippled`が残りのネットワークと同期されたら、ストック`rippled`サーバーが完全に機能するようになります。このサーバーを、ローカル署名やXRP LedgerへのAPIアクセスに使用できます。`rippled`サーバーがネットワークと同期されているかどうかを判別するには、[`rippled`サーバーの状況](rippled-server-states.html)を使用します。[`rippled`のコマンドラインインターフェイス](get-started-using-http-websocket-apis.html#コマンドライン)を使用すれば、これを迅速にテストできます。
 
-{% if currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-ubuntu.md" or
-      currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-macos.md" %}
-    $ ./rippled server_info
-{% else %}
-    $ /opt/ripple/bin/rippled server_info
-{% endif %}
+```sh
+rippled server_info
+```
 
 rippled APIを使用した`rippled`サーバーとの通信について詳しくは、[rippled API reference](http-websocket-apis.html)を参照してください。
 
@@ -27,20 +24,6 @@ rippled APIを使用した`rippled`サーバーとの通信について詳しく
 
 構成の変更を有効にするには、`rippled`を再起動する必要があります。
 
-{% if currentpage.md == "tutorials/manage-the-rippled-server/installation/install-rippled-on-ubuntu.md" or
-      currentpage.md == "tutorials/manage-the-rippled-server/installation/install-rippled-on-centos-rhel-with-yum" %}
-        $ sudo systemctl restart rippled.service
-
-{% elif currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-ubuntu.md" or
-        currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-macos.md" %}
-
-
-* Ctrl-Cを使用して`rippled`を停止し、その後再起動します。
-
-      $ ./rippled
-
-{% endif %}
-
 `[debug_logfile]`セクションまたは`[database_path]`セクションを変更すると、`rippled`を実行するユーザーに、新しく構成したパスの所有権を付与する必要が生じる場合があります。
 
 ### 更新

content/_snippets/post-rippled-install.md

@@ -2,12 +2,9 @@ It can take several minutes to sync with the rest of the XRP Ledger network, dur
 
 You can use the [`rippled` commandline interface](get-started-using-http-websocket-apis.html#commandline) to see if your server is synced with the network:
 
-{% if currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-ubuntu.md" or
-      currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-macos.md" %}
-    ./rippled server_info
-{% else %}
-    /opt/ripple/bin/rippled server_info
-{% endif %}
+```sh
+rippled server_info
+```
 
 If the `server_state` in the response is `full` or `proposing`, then your server is fully synced to the network. Otherwise, you may need to wait longer. Fresh servers usually sync within 15 minutes; servers that already have [ledger history](ledger-history.html) stored can take longer.
 
@@ -21,25 +18,11 @@ Having trouble getting your server started? See [rippled Server Won't Start](ser
 
 `rippled` should connect to the XRP Ledger with the default configuration. However, you can change your settings by editing the `rippled.cfg` file. For recommendations about configuration settings, see [Capacity Planning](capacity-planning.html).
 
-{% include '_snippets/conf-file-location.md' %}<!--_ -->
+{% include '_snippets/conf-file-location.md' %}
 
 See [the `rippled` GitHub repository](https://github.com/XRPLF/rippled/blob/master/cfg/rippled-example.cfg) for a description of all configuration options.
 
-You must restart `rippled` for any configuration changes to take effect:
-
-
-{% if currentpage.md == "tutorials/manage-the-rippled-server/installation/install-rippled-on-ubuntu.md" or
-      currentpage.md == "tutorials/manage-the-rippled-server/installation/install-rippled-on-centos-rhel-with-yum" %}
-        sudo systemctl restart rippled.service
-
-{% elif currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-ubuntu.md" or
-        currentpage.md == "tutorials/manage-the-rippled-server/installation/build-run-rippled-macos.md" %}
-
-  * Use Ctrl-C to stop `rippled`, then start it again:
-
-        ./rippled
-
-{% endif %}
+You must restart `rippled` for any configuration changes to take effect.
 
 If you change the `[debug_logfile]` or `[database_path]` sections, you may need to grant ownership of the new configured path to the user you run `rippled` as.