diff --git a/Contributor Documentation/LSP Extensions.md b/Contributor Documentation/LSP Extensions.md
index d8552e66f..d99af467b 100644
--- a/Contributor Documentation/LSP Extensions.md	
+++ b/Contributor Documentation/LSP Extensions.md	
@@ -81,80 +81,6 @@ Added case
 identifier = 'identifier'
 ```
 
-## `WorkspaceFolder`
-
-Added field:
-
-```ts
-/**
- * Build settings that should be used for this workspace.
- *
- * For arguments that have a single value (like the build configuration), this takes precedence over the global
- * options set when launching sourcekit-lsp. For all other options, the values specified in the workspace-specific
- * build setup are appended to the global options.
- */
-var buildSetup?: WorkspaceBuildSetup
-```
-
-with
-
-```ts
-/**
- * The configuration to build a workspace in.
- */
-export enum BuildConfiguration {
-  case debug = 'debug'
-  case release = 'release'
-}
-
-/**
- * The type of workspace; default workspace type selection logic can be overridden.
- */
-export enum WorkspaceType {
-  buildServer = 'buildServer'
-  compilationDatabase = 'compilationDatabase'
-  swiftPM = 'swiftPM'
-}
-
-/// Build settings that should be used for a workspace.
-interface WorkspaceBuildSetup {
-  /**
-   * The configuration that the workspace should be built in.
-   */
-  buildConfiguration?: BuildConfiguration;
-
-  /**
-   * The default workspace type to use for this workspace.
-   */
-  defaultWorkspaceType?: WorkspaceType;
-
-  /**
-   * The build directory for the workspace.
-   */
-  scratchPath?: DocumentURI;
-
-  /**
-   * Arguments to be passed to any C compiler invocations.
-   */
-  cFlags?: string[];
-
-  /**
-   * Arguments to be passed to any C++ compiler invocations.
-   */
-  cxxFlags?: string[];
-
-  /**
-   * Arguments to be passed to any linker invocations.
-   */
-  linkerFlags?: string[];
-
-  /**
-   * Arguments to be passed to any Swift compiler invocations.
-   */
-  swiftFlags?: string[];
-}
-```
-
 ## `textDocument/completion`
 
 Added field: