removed DedupePlugin

it's no longer needed for npm3
and causes many issues

Author: sokra

bin/config-optimist.js

@@ -37,7 +37,6 @@ module.exports = function(optimist) {
 		.describe("optimize-max-chunks", "Try to keep the chunk count below a limit")
 		.describe("optimize-min-chunk-size", "Try to keep the chunk size above a limit")
 		.boolean("optimize-minimize").describe("optimize-minimize", "Minimize javascript and switches loaders to minimizing")
-		.boolean("optimize-dedupe").describe("optimize-dedupe", "Optimize duplicate module sources in the bundle")
 		.string("prefetch").describe("prefetch", "Prefetch this request")
 		.string("provide").describe("provide", "Provide these modules as free vars in all modules")
 		.boolean("labeled-modules").describe("labeled-modules", "Enables labeled modules")

bin/config-yargs.js

@@ -219,11 +219,6 @@ module.exports = function(yargs) {
 				describe: "Minimize javascript and switches loaders to minimizing",
 				group: OPTIMIZE_GROUP
 			},
-			"optimize-dedupe": {
-				type: "boolean",
-				describe: "Optimize duplicate module sources in the bundle",
-				group: OPTIMIZE_GROUP
-			},
 			"prefetch": {
 				type: "string",
 				describe: "Prefetch this request (Example: --prefetch ./file.js)",

bin/convert-argv.js

@@ -457,12 +457,6 @@ module.exports = function(yargs, argv, convertOptions) {
 			}));
 		});
 
-		ifBooleanArg("optimize-dedupe", function() {
-			ensureArray(options, "plugins");
-			var DedupePlugin = require("../lib/optimize/DedupePlugin");
-			options.plugins.push(new DedupePlugin());
-		});
-
 		ifArg("prefetch", function(request) {
 			ensureArray(options, "plugins");
 			var PrefetchPlugin = require("../lib/PrefetchPlugin");