remove accidental push of seperator to FileSystemProvider

src/vs/vscode.proposed.d.ts

@@ -147,7 +147,6 @@ declare module 'vscode' {
 	//#region Joh - read/write in chunks
 
 	export interface FileSystemProvider {
-		seperator?: '/' | '\\';
 		open?(resource: Uri, options: { create: boolean }): number | Thenable<number>;
 		close?(fd: number): void | Thenable<void>;
 		read?(fd: number, pos: number, data: Uint8Array, offset: number, length: number): number | Thenable<number>;