Update CODEOWNERS

Remove myself from CODEOWNERS for XCBuildSupport. CODEOWNERS doesn't stack, so this blocks others on the team from approving PRs that change these files and makes me single serialization point.

Author: jakepetroules

CODEOWNERS

@@ -26,7 +26,6 @@
 
 * @jakepetroules @dschaefer2 @shawnhyam @bripeticca @plemarquand @owenv @bkhouri @cmcgee1024 @daveyc123
 
-Sources/XCBuildSupport/* @jakepetroules
 Sources/Commands/PackageCommands/Migrate.swift @AnthonyLatsis @bnbarham @xedin @jakepetroules @dschaefer2 @shawnhyam @bripeticca @plemarquand @owenv @bkhouri @cmcgee1024 @daveyc123
 Sources/SwiftFixIt/* @AnthonyLatsis @bnbarham @xedin @jakepetroules @dschaefer2 @shawnhyam @bripeticca @plemarquand @owenv @bkhouri @cmcgee1024 @daveyc123
 Tests/SwiftFixItTests/* @AnthonyLatsis @bnbarham @xedin @jakepetroules @dschaefer2 @shawnhyam @bripeticca @plemarquand @owenv @bkhouri @cmcgee1024 @daveyc123