Revert "doc: note that brew installed qt is not supported"

This reverts commit 33b0b26.

Author: hebasto

doc/build-osx.md

@@ -96,14 +96,6 @@ Skip if you don't intend to use the GUI.
 brew install qt@5
 ```
 
-Ensure that the `qt@5` package is installed, not the `qt` package.
-If 'qt' is installed, the build process will fail.
-if installed, remove the `qt` package with the following command:
-
-``` bash
-brew uninstall qt
-```
-
 Note: Building with Qt binaries downloaded from the Qt website is not officially supported.
 See the notes in [#7714](https://github.com/bitcoin/bitcoin/issues/7714).