Remove unneeded files from third_party/polymer.

third_party/polymer/v1_0/components-chromium/iron-dropdown/bower.json

Index: third_party/polymer/v1_0/components-chromium/iron-dropdown/bower.json
diff --git a/third_party/polymer/v1_0/components-chromium/iron-dropdown/bower.json b/third_party/polymer/v1_0/components-chromium/iron-dropdown/bower.json
deleted file mode 100644
index 8b9b75b4b49be5a7b9f49f13810acdd32e5e82e1..0000000000000000000000000000000000000000
--- a/third_party/polymer/v1_0/components-chromium/iron-dropdown/bower.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-  "name": "iron-dropdown",
-  "version": "1.2.0",
-  "description": "An unstyled element that works similarly to a native browser select",
-  "authors": [
-    "The Polymer Authors"
-  ],
-  "keywords": [
-    "web-components",
-    "web-component",
-    "polymer"
-  ],
-  "main": "iron-dropdown.html",
-  "private": true,
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/PolymerElements/iron-dropdown"
-  },
-  "license": "http://polymer.github.io/LICENSE.txt",
-  "homepage": "https://github.com/PolymerElements/iron-dropdown",
-  "dependencies": {
-    "polymer": "polymer/polymer#^1.0.0",
-    "iron-behaviors": "polymerelements/iron-behaviors#^1.0.0",
-    "iron-overlay-behavior": "polymerelements/iron-overlay-behavior#^1.0.0",
-    "iron-resizable-behavior": "polymerelements/iron-resizable-behavior#^1.0.0",
-    "neon-animation": "polymerelements/neon-animation#^1.0.0",
-    "iron-a11y-keys-behavior": "polymerelements/iron-a11y-keys-behavior#^1.0.0"
-  },
-  "devDependencies": {
-    "iron-component-page": "polymerelements/iron-component-page#^1.0.0",
-    "test-fixture": "polymerelements/test-fixture#^1.0.0",
-    "iron-test-helpers": "polymerelements/iron-test-helpers#^1.0.0",
-    "paper-styles": "polymerelements/paper-styles#^1.0.0",
-    "webcomponentsjs": "webcomponents/webcomponentsjs#^0.7.0",
-    "web-component-tester": "^4.0.0",
-    "iron-image": "polymerelements/iron-image#^1.0.0"
-  },
-  "ignore": []
-}