Add remove(), removeAll().

and removeSync(), removeAllSync().

js/remove.ts

@@ -0,0 +1,63 @@
+// Copyright 2018 the Deno authors. All rights reserved. MIT license.
+import * as fbs from "gen/msg_generated";
+import { flatbuffers } from "flatbuffers";
+import * as dispatch from "./dispatch";
+
+/**
+ * Removes the named file or (empty) directory synchronously.
+ * Would throw error if permission denied, not found, or
+ * directory not empty.
+ *
+ *     import { removeSync } from "deno";
+ *     removeSync("/path/to/empty_dir/or/file");
+ */
+export function removeSync(path: string): void {
+  dispatch.sendSync(...req(path, false));
+}
+
+/**
+ * Removes the named file or (empty) directory.
+ * Would throw error if permission denied, not found, or
+ * directory not empty.
+ *
+ *     import { remove } from "deno";
+ *     await remove("/path/to/empty_dir/or/file");
+ */
+export async function remove(path: string): Promise<void> {
+  await dispatch.sendAsync(...req(path, false));
+}
+
+/**
+ * Recursively removes the named file or directory synchronously.
+ * Would throw error if permission denied or not found
+ *
+ *     import { removeAllSync } from "deno";
+ *     removeAllSync("/path/to/dir/or/file");
+ */
+export function removeAllSync(path: string): void {
+  dispatch.sendSync(...req(path, true));
+}
+
+/**
+ * Recursively removes the named file or directory.
+ * Would throw error if permission denied or not found
+ *
+ *     import { removeAll } from "deno";
+ *     await removeAll("/path/to/dir/or/file");
+ */
+export async function removeAll(path: string): Promise<void> {
+  await dispatch.sendAsync(...req(path, true));
+}
+
+function req(
+  path: string,
+  recursive: boolean
+): [flatbuffers.Builder, fbs.Any, flatbuffers.Offset] {
+  const builder = new flatbuffers.Builder();
+  const path_ = builder.createString(path);
+  fbs.Remove.startRemove(builder);
+  fbs.Remove.addPath(builder, path_);
+  fbs.Remove.addRecursive(builder, recursive);
+  const msg = fbs.Remove.endRemove(builder);
+  return [builder, fbs.Any.Remove, msg];
+}