Xcode 16 with Swift 6 has been released, we can drop support for building and testing SourceKit-LSP using a Swift 5.10 toolchain. This allows us to remove a number of workarounds.
CompilationDatabaseBuildSystem
BuildSystemManager
BuildSystemMessageDependencyTracker
SwiftPMBuildSystem.swift
BuildTargetIdentifier
ConfiguredTarget
CompilationDatabase.swift
FallbackBuildSystem
FileBuildSettings.patching
PrefixMessageWithTaskEmoji.swift
QueueBasedMessageHandler
SKCore
BuildSystemIntegration
TestBuildSystem.swift