1 files changed, 0 insertions, 45 deletions
diff --git a/addon-sdk/source/lib/diffpatcher/diff.js b/addon-sdk/source/lib/diffpatcher/diff.js
deleted file mode 100644
index 967c137e6..000000000
--- a/addon-sdk/source/lib/diffpatcher/diff.js
+++ /dev/null
@@ -1,45 +0,0 @@
-"use strict";
-
-var method = require("../method/core")
-
-// Method is designed to work with data structures representing application
-// state. Calling it with a state should return object representing `delta`
-// that has being applied to a previous state to get to a current state.
-//
-// Example
-//
-// diff(state) // => { "item-id-1": { title: "some title" } "item-id-2": null }
-var diff = method("diff@diffpatcher")
-
-// diff between `null` / `undefined` to any hash is a hash itself.
-diff.define(null, function(from, to) { return to })
-diff.define(undefined, function(from, to) { return to })
-diff.define(Object, function(from, to) {
-  return calculate(from, to || {}) || {}
-})
-
-function calculate(from, to) {
-  var diff = {}
-  var changes = 0
-  Object.keys(from).forEach(function(key) {
-    changes = changes + 1
-    if (!(key in to) && from[key] != null) diff[key] = null
-    else changes = changes - 1
-  })
-  Object.keys(to).forEach(function(key) {
-    changes = changes + 1
-    var previous = from[key]
-    var current = to[key]
-    if (previous === current) return (changes = changes - 1)
-    if (typeof(current) !== "object") return diff[key] = current
-    if (typeof(previous) !== "object") return diff[key] = current
-    var delta = calculate(previous, current)
-    if (delta) diff[key] = delta
-    else changes = changes - 1
-  })
-  return changes ? diff : null
-}
-
-diff.calculate = calculate
-
-module.exports = diff