style: format code with Prettier and remove unused code

Change-Id: I382f39d142cfa29f192447b0d2c6d48e113327b4
diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 4bc65c1..1d20459 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1,26 +1,26 @@
 {
-	"appName": {
-		"message": "Report Webpages",
-		"description": "The app name"
-	},
-	"appDescription": {
-	"message": "Quickly report webpages clicking in the extension icon in the Omnibox",
-		"description": "The app description"
-	},
-	"report_badware": {
-		"message": "Report badware",
-		"description": "Button in the popup"
-	},
-	"report_webspam": {
-		"message": "Report webspam",
-		"description": "Button in the popup"
-	},
-	"report_phishing": {
-		"message": "Report phishing",
-		"description": "Button in the popup"
-	},
-	"options_closebutton": {
-		"message": "Close",
-		"description": "Close button in the settings page"
-	}
+  "appName": {
+    "message": "Report Webpages",
+    "description": "The app name"
+  },
+  "appDescription": {
+    "message": "Quickly report webpages clicking in the extension icon in the Omnibox",
+    "description": "The app description"
+  },
+  "report_badware": {
+    "message": "Report badware",
+    "description": "Button in the popup"
+  },
+  "report_webspam": {
+    "message": "Report webspam",
+    "description": "Button in the popup"
+  },
+  "report_phishing": {
+    "message": "Report phishing",
+    "description": "Button in the popup"
+  },
+  "options_closebutton": {
+    "message": "Close",
+    "description": "Close button in the settings page"
+  }
 }