Clamp typechecks -> Flow

Reviewed By: yungsters

Differential Revision: D8219220

fbshipit-source-id: e849d9dae573459e4b09e317cc6dc37bec9ce4e8

Libraries/Utilities/clamp.js

@@ -5,18 +5,12 @@
  * LICENSE file in the root directory of this source tree.
  *
  * @format
- * @typechecks
+ * @flow
  */
 
 'use strict';
 
-/**
- * @param {number} min
- * @param {number} value
- * @param {number} max
- * @return {number}
- */
-function clamp(min, value, max) {
+function clamp(min: number, value: number, max: number): number {
   if (value < min) {
     return min;
   }