Stop supporting Google and Azure as backup strategies

The amount of gems required is quite high compared to the usefulness
of the features.

Related to !4928, !6713
Signed-off-by: Rémy Coutable <remy@rymai.me>

Gemfile

@@ -85,10 +85,8 @@ gem 'dropzonejs-rails', '~> 0.7.1'
 
 # for backups
 gem 'fog-aws', '~> 0.9'
-gem 'fog-azure', '~> 0.0'
 gem 'fog-core', '~> 1.40'
 gem 'fog-local', '~> 0.3'
-gem 'fog-google', '~> 0.3'
 gem 'fog-openstack', '~> 0.1'
 gem 'fog-rackspace', '~> 0.1.1'
 

Gemfile.lock

@@ -66,21 +66,6 @@ GEM
       descendants_tracker (~> 0.0.4)
       ice_nine (~> 0.11.0)
       thread_safe (~> 0.3, >= 0.3.1)
-    azure (0.7.5)
-      addressable (~> 2.3)
-      azure-core (~> 0.1)
-      faraday (~> 0.9)
-      faraday_middleware (~> 0.10)
-      json (~> 1.8)
-      mime-types (>= 1, < 3.0)
-      nokogiri (~> 1.6)
-      systemu (~> 2.6)
-      thor (~> 0.19)
-      uuid (~> 2.0)
-    azure-core (0.1.2)
-      faraday (~> 0.9)
-      faraday_middleware (~> 0.10)
-      nokogiri (~> 1.6)
     babel-source (5.8.35)
     babel-transpiler (0.7.0)
       babel-source (>= 4.0, < 6)
@@ -217,19 +202,10 @@ GEM
       fog-json (~> 1.0)
       fog-xml (~> 0.1)
       ipaddress (~> 0.8)
-    fog-azure (0.0.2)
-      azure (~> 0.6)
-      fog-core (~> 1.27)
-      fog-json (~> 1.0)
-      fog-xml (~> 0.1)
     fog-core (1.42.0)
       builder
       excon (~> 0.49)
       formatador (~> 0.2)
-    fog-google (0.3.2)
-      fog-core
-      fog-json
-      fog-xml
     fog-json (1.0.2)
       fog-core (~> 1.0)
       multi_json (~> 1.10)
@@ -397,8 +373,6 @@ GEM
       rb-inotify (>= 0.9)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
-    macaddr (1.7.1)
-      systemu (~> 2.6.2)
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
     mail_room (0.9.0)
@@ -728,7 +702,6 @@ GEM
     sys-filesystem (1.1.6)
       ffi
     sysexits (1.2.0)
-    systemu (2.6.5)
     teaspoon (1.1.5)
       railties (>= 3.2.5, < 6)
     teaspoon-jasmine (2.2.0)
@@ -768,8 +741,6 @@ GEM
       get_process_mem (~> 0)
       unicorn (>= 4, < 6)
     uniform_notifier (1.10.0)
-    uuid (2.3.8)
-      macaddr (~> 1.0)
     version_sorter (2.1.0)
     virtus (1.0.5)
       axiom-types (~> 0.1)
@@ -849,9 +820,7 @@ DEPENDENCIES
   ffaker (~> 2.0.0)
   flay (~> 2.6.1)
   fog-aws (~> 0.9)
-  fog-azure (~> 0.0)
   fog-core (~> 1.40)
-  fog-google (~> 0.3)
   fog-local (~> 0.3)
   fog-openstack (~> 0.1)
   fog-rackspace (~> 0.1.1)

changelogs/unreleased/remove-backup-strategies.yml

+---
+title: Stop supporting Google and Azure as backup strategies
+merge_request: 
+author: 

doc/raketasks/backup_restore.md

@@ -88,7 +88,7 @@ It uses the [Fog library](http://fog.io/) to perform the upload.
 In the example below we use Amazon S3 for storage, but Fog also lets you use
 [other storage providers](http://fog.io/storage/). GitLab
 [imports cloud drivers](https://gitlab.com/gitlab-org/gitlab-ce/blob/30f5b9a5b711b46f1065baf755e413ceced5646b/Gemfile#L88)
-for AWS, Azure, Google, OpenStack Swift and Rackspace as well. A local driver is
+for AWS, OpenStack Swift and Rackspace as well. A local driver is
 [also available](#uploading-to-locally-mounted-shares).
 
 For omnibus packages: