diff --git a/prototype/Doubt.xcworkspace/contents.xcworkspacedata b/prototype/Doubt.xcworkspace/contents.xcworkspacedata
index ab4e094cd..e9a97cf75 100644
--- a/prototype/Doubt.xcworkspace/contents.xcworkspacedata
+++ b/prototype/Doubt.xcworkspace/contents.xcworkspacedata
@@ -7,21 +7,6 @@
    <FileRef
       location = "group:External/Assertions/Assertions.xcodeproj">
    </FileRef>
-   <FileRef
-      location = "group:External/SourceKitten/sourcekitten.xcodeproj">
-   </FileRef>
-   <FileRef
-      location = "group:External/SourceKitten/Carthage/Checkouts/Commandant/Commandant.xcodeproj">
-   </FileRef>
-   <FileRef
-      location = "group:External/SourceKitten/Carthage/Checkouts/Result/Result.xcodeproj">
-   </FileRef>
-   <FileRef
-      location = "group:External/SourceKitten/Carthage/Checkouts/SwiftXPC/SwiftXPC.xcodeproj">
-   </FileRef>
-   <FileRef
-      location = "group:External/SourceKitten/Carthage/Checkouts/SWXMLHash/SWXMLHash.xcodeproj">
-   </FileRef>
    <FileRef
       location = "group:External/Stream/Stream.xcodeproj">
    </FileRef>