Remove default_branch support from API project creation

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

doc/api/projects.md

@@ -213,7 +213,6 @@ Parameters:
 
 + `name` (required) - new project name
 + `description` (optional) - short project description
-+ `default_branch` (optional) - 'master' by default
 + `issues_enabled` (optional)
 + `wall_enabled` (optional)
 + `merge_requests_enabled` (optional)

lib/api/projects.rb

@@ -60,7 +60,6 @@ module API
       # Parameters:
       #   name (required) - name for new project
       #   description (optional) - short project description
-      #   default_branch (optional) - 'master' by default
       #   issues_enabled (optional)
       #   wall_enabled (optional)
       #   merge_requests_enabled (optional)
@@ -75,7 +74,6 @@ module API
         attrs = attributes_for_keys [:name,
                                      :path,
                                      :description,
-                                     :default_branch,
                                      :issues_enabled,
                                      :wall_enabled,
                                      :merge_requests_enabled,

spec/requests/api/projects_spec.rb

@@ -91,7 +91,6 @@ describe API::API do
     it "should assign attributes to project" do
       project = attributes_for(:project, {
         description: Faker::Lorem.sentence,
-        default_branch: 'stable',
         issues_enabled: false,
         wall_enabled: false,
         merge_requests_enabled: false,
@@ -110,16 +109,13 @@ describe API::API do
       project = attributes_for(:project, { public: true })
       post api("/projects", user), project
       json_response['public'].should be_true
-
     end
 
     it "should set a project as private" do
       project = attributes_for(:project, { public: false })
       post api("/projects", user), project
       json_response['public'].should be_false
-
     end
-
   end
 
   describe "POST /projects/user/:id" do
@@ -146,7 +142,6 @@ describe API::API do
     it "should assign attributes to project" do
       project = attributes_for(:project, {
         description: Faker::Lorem.sentence,
-        default_branch: 'stable',
         issues_enabled: false,
         wall_enabled: false,
         merge_requests_enabled: false,