Update the platforms we test on

Signed-off-by: Tim Smith <tsmith@chef.io>

.kitchen.dokken.yml

@@ -19,13 +19,6 @@ platforms:
     image: dokken/amazonlinux
     pid_one_command: /sbin/init
 
-- name: debian-7
-  driver:
-    image: dokken/debian-7
-    pid_one_command: /sbin/init
-    intermediate_instructions:
-      - RUN /usr/bin/apt-get update
-
 - name: debian-8
   driver:
     image: dokken/debian-8

.kitchen.yml

@@ -14,8 +14,6 @@ platforms:
       box: mvbcoding/awslinux
   - name: centos-6
   - name: centos-7
-  - name: debian-7
-    run_list: apt::default
   - name: debian-8
     run_list: apt::default
   - name: debian-9
@@ -51,7 +49,7 @@ suites:
     postfix:
       recipient_canonical_map_entries:
         john: john@doe.com
-        
+
 - name: sasl_auth_none
   run_list:
   - recipe[postfix::sasl_auth]

Gemfile

@@ -6,5 +6,4 @@
 
 source 'https://rubygems.org'
 
-gem 'stove'
 gem 'community_cookbook_releaser'