Remove breadcrumbs (causes crash and wasn't being used)

website/Gemfile

@@ -1,5 +1,4 @@
 source "https://rubygems.org"
 
 gem "middleman-hashicorp", github: "hashicorp/middleman-hashicorp"
-gem "middleman-breadcrumbs"
 gem "htmlbeautifier"

website/Gemfile.lock

@@ -95,8 +95,6 @@ GEM
       middleman-sprockets (>= 3.1.2)
       sass (>= 3.4.0, < 4.0)
       uglifier (~> 2.5)
-    middleman-breadcrumbs (0.2.0)
-      middleman (>= 3.3.5)
     middleman-core (3.4.1)
       activesupport (~> 4.1)
       bundler (~> 1.1)
@@ -191,5 +189,7 @@ PLATFORMS
 
 DEPENDENCIES
   htmlbeautifier
-  middleman-breadcrumbs
   middleman-hashicorp!
+
+BUNDLED WITH
+   1.10.6

website/config.rb

@@ -1,7 +1,5 @@
 set :base_url, "https://www.packer.io/"
 
-activate :breadcrumbs
-
 activate :hashicorp do |h|
   h.name        = "packer"
   h.version     = "0.8.6"