Remove custom theme icons (#1731)

docs/advanced/integrating-metadata-removal.en.md

@@ -7,7 +7,7 @@ When sharing files, it's important to remove associated metadata. Image files co
 
 While there are plenty of metadata removal tools, they typically aren't convenient to use. The guides featured here aim to detail how to integrate metadata removal tools in a simple fashion by utilizing easy-to-access system features.
 
-- [Recommended metadata removal tools :hero-arrow-circle-right-fill:](../data-redaction.md)
+- [Recommended metadata removal tools :material-arrow-right-drop-circle:](../data-redaction.md)
 
 ## macOS
 

docs/advanced/signal-configuration-hardening.en.md

@@ -1,6 +1,6 @@
 ---
 title: "Signal Configuration and Hardening"
-icon: 'material/chat-processing'
+icon: 'simple/signal'
 ---
 
 [Signal](../real-time-communication.md#signal) is a widely regarded instant messaging service that is not only easy to use but is also private and secure. Signal's strong E2EE implementation and metadata protections provide a level of assurance that only you and your intended recipients are able to read communications.
@@ -212,8 +212,8 @@ On Android you can consider using **Molly**, a fork of the Signal mobile client
 
     ??? downloads
 
-         - [:pg-f-droid: F-Droid](https://molly.im/download/fdroid/)
-         - [:fontawesome-brands-github: GitHub](https://github.com/mollyim/mollyim-android/releases)
+         - [:simple-fdroid: F-Droid](https://molly.im/download/fdroid/)
+         - [:simple-github: GitHub](https://github.com/mollyim/mollyim-android/releases)
 
 Molly offers two variants of the app: **Molly** and **Molly-FOSS**.