Xcode 12, How to suppress "Double-quoted include in framework header" warnings throughout entire project

I think a simpler way is to go in the project's Build Settings a just set the option Quoted Include In Framework Header to No :

You can disable these warnings for your entire project by navigating to your project's "build settings", finding the field "other linker flags" and adding the following flag:

-Wno-quoted-include-in-framework-header