Update CODEOWNERS (#10140)

I think we can reduce this list to just be `*`.

Author: jonathanpeppers

.github/CODEOWNERS

@@ -9,57 +9,4 @@
 # https://help.github.com/articles/about-codeowners
 
 # These owners will be the default owners for everything in the repo.
-* @jonpryor
-
-# Order is important. The last matching pattern has the most precedence.
-
-/build-tools/api-merge @jonpryor
-/build-tools/api-xml-adjuster @jonpryor
-/build-tools/automation @pjcollins @jonpryor
-/build-tools/cmake @grendello
-/build-tools/wrap-sh @grendello
-/build-tools/debian-metadata @directhex
-/build-tools/enumification-helpers @jonpryor
-/build-tools/manifest-attribute-codegen @jonpryor
-/build-tools/scripts/PrepareWindows.targets @jonathanpeppers
-/build-tools/timing @jonathanpeppers
-/build-tools/xaprepare @grendello
-
-/eng @jonathanpeppers @pjcollins @jonpryor
-
-/src/Mono.Android.Export @jonpryor
-/src/r8 @jonathanpeppers @jonpryor
-/src/Xamarin.Android.Build.Tasks @jonathanpeppers
-/src/Xamarin.Android.Build.Tasks/Linker @jonpryor
-/src/Xamarin.Android.Build.Tasks/Utilities/LlvmIrGenerator @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/TypeMap* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/MarshalMethods* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/ApplicationConfig* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/*AssemblyStore* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/AssemblyCompression* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/CompressedAssembl* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/ELFHelper* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/EnvironmentFilesParser* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/JniRemappingAssemblyGenerator* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/NativeTypeMappingData* @grendello
-/src/Xamarin.Android.Build.Tasks/Utilities/NdkTools @grendello
-/src/Xamarin.Android.NamingCustomAttributes @jonpryor
-/src/Xamarin.Android.Tools.Aidl @jonpryor
-/src/monodroid/ @jonpryor @grendello
-/src/sqlite-xamarin @grendello
-/tests/TestRunner.* @grendello
-/tests/BCL-Tests @grendello
-/tests/CodeBehind @grendello
-/src/Mono.Android/Xamarin.Android.Net @grendello
-/build-tools/scripts/dependencies @grendello
-
-# Android Designer team relies on the files in this directory,
-# any changes there should be ran past them
-/src/Mono.Android/java/mono/android/ @mcumming @jonpryor
-/src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Designer.targets @mcumming @jonpryor
-
-/tools/assembly-store-reader @grendello
-/tools/decompress-assemblies @grendello
-/tools/jit-times @jonpryor
-/tools/setup-windows @jonathanpeppers @jonpryor
-/tools/tmt @grendello
+* @jonathanpeppers @grendello