Remove cpy-cli and rimraf dependencies; replace with simple script helper.

scripts/index.js

@@ -0,0 +1,21 @@
+// @ts-check
+
+"use strict";
+
+const fs = require("fs");
+const globby = require("globby");
+
+const [ command, ...args ] = process.argv.slice(2);
+
+if (command === "copy") {
+  const [ src, dest ] = args;
+  fs.copyFileSync(src, dest);
+} else if (command === "delete") {
+  for (const arg of args) {
+    for (const file of globby.sync(arg)) {
+      fs.unlinkSync(file);
+    }
+  }
+} else {
+  throw new Error(`Unsupported command: ${command}`);
+}