Use linguist from rubygems

Gemfile

@@ -29,7 +29,7 @@ gem 'omniauth-github'
 
 # Extracting information from a git repository
 # Provide access to Gitlab::Git library
-gem "gitlab_git", "~> 4.1.0"
+gem "gitlab_git", "~> 5.0.0"
 
 # Ruby/Rack Git Smart-HTTP Server Handler
 gem 'gitlab-grack', '~> 2.0.0.pre', require: 'grack'
@@ -41,7 +41,7 @@ gem 'gitlab_omniauth-ldap', '1.0.3', require: "omniauth-ldap"
 gem "gitlab-gollum-lib", "~> 1.1.0", require: 'gollum-lib'
 
 # Language detection
-gem "gitlab-linguist", "~> 2.9.6", require: "linguist", git: 'https://gitlab.com/gitlab-org/linguist.git', ref: 'b337f7013333863503a8a7894cceb568478fda66'
+gem "gitlab-linguist", "~> 3.0.0", require: "linguist"
 
 # API
 gem "grape", "~> 0.6.1"

Gemfile.lock

@@ -5,16 +5,6 @@ GIT
   specs:
     github-markup (0.7.6)
 
-GIT
-  remote: https://gitlab.com/gitlab-org/linguist.git
-  revision: b337f7013333863503a8a7894cceb568478fda66
-  ref: b337f7013333863503a8a7894cceb568478fda66
-  specs:
-    gitlab-linguist (2.9.6)
-      charlock_holmes (~> 0.6.6)
-      escape_utils (~> 0.2.4)
-      mime-types (~> 1.19)
-
 GEM
   remote: https://rubygems.org/
   specs:
@@ -182,10 +172,14 @@ GEM
       diff-lcs (~> 1.1)
       mime-types (~> 1.15)
       posix-spawn (~> 0.3.6)
-    gitlab_git (4.1.0)
+    gitlab-linguist (3.0.0)
+      charlock_holmes (~> 0.6.6)
+      escape_utils (~> 0.2.4)
+      mime-types (~> 1.19)
+    gitlab_git (5.0.0)
       activesupport (~> 4.0.0)
       gitlab-grit (~> 2.6.1)
-      gitlab-linguist (~> 2.9.5)
+      gitlab-linguist (~> 3.0.0)
     gitlab_meta (6.0)
     gitlab_omniauth-ldap (1.0.3)
       net-ldap (~> 0.3.1)
@@ -579,8 +573,8 @@ DEPENDENCIES
   gitlab-flowdock-git-hook (~> 0.4.2)
   gitlab-gollum-lib (~> 1.1.0)
   gitlab-grack (~> 2.0.0.pre)
-  gitlab-linguist (~> 2.9.6)!
-  gitlab_git (~> 4.1.0)
+  gitlab-linguist (~> 3.0.0)
+  gitlab_git (~> 5.0.0)
   gitlab_meta (= 6.0)
   gitlab_omniauth-ldap (= 1.0.3)
   gon (~> 5.0.0)