fix build errors

Author: matthewbastien

Sources/SourceKitLSP/Documentation/DocCBuildInformation.swift

@@ -11,12 +11,9 @@
 //===----------------------------------------------------------------------===//
 
 #if canImport(SwiftDocC)
+import BuildServerProtocol
 import Foundation
-import IndexStoreDB
 import LanguageServerProtocol
-import SemanticIndex
-@preconcurrency import SwiftDocC
-import SwiftExtensions
 
 struct DocCBuildInformation {
   let catalogURL: URL?

Sources/SourceKitLSP/Documentation/DoccDocumentationHandler.swift

@@ -12,7 +12,9 @@
 
 #if canImport(SwiftDocC)
 import Foundation
+import IndexStoreDB
 import Markdown
+import SemanticIndex
 import SymbolKit
 
 #if compiler(>=6)

Sources/SourceKitLSP/Swift/DoccDocumentation.swift

@@ -12,6 +12,8 @@
 
 #if canImport(SwiftDocC)
 import Foundation
+import SemanticIndex
+import SwiftExtensions
 import SwiftSyntax
 
 #if compiler(>=6)