Remove duplicate information

This information exists in git's commit history and in the AUTHORS file.

src/icons/README.md

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 # qBittorrent Icons
 
-## Previous
-Old icons were created by Bert Verhelst (<verhelstbert@gmail.com>).
-Icons were based on the [Font-Awesome](https://fontawesome.com/icons) icon set.
-
-## Redesign
-Redesigned icons has been created by Nowshed H. Imran (<nowshed.imran@gmail.com>). There are some additional icons available in [flow-icon](https://github.com/nowshed-imran/flow-icon) repository that can be used in future development.
-New icons are based on [la-capitaine-icon-theme](https://github.com/keeferrourke/la-capitaine-icon-theme) and [ionicons](https://github.com/ionic-team/ionicons).
-`la-capitaine` project is owned by Keefer Rourke and due permission was received before modifying them.
-`ionicons` project is under MIT license and thus it can be used freely.
-Both of these projects can be used as reference for future icon designs.
-
 ## Color Reference
 Colors have been selected from Qt documented [SVG Colors](https://doc.qt.io/qt-6/qcolorconstants.html#svg-colors). It is recommended to use color Hex from the given source.