Revert back to not defining a default Git access protocol.

app/helpers/branches_helper.rb

@@ -12,7 +12,7 @@ module BranchesHelper
   def can_push_branch?(project, branch_name)
     return false unless project.repository.branch_exists?(branch_name)
 
-    ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(branch_name)
+    ::Gitlab::GitAccess.new(current_user, project, 'web').can_push_to_branch?(branch_name)
   end
 
   def project_branches

app/models/merge_request.rb

@@ -481,7 +481,7 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def can_be_merged_by?(user)
-    ::Gitlab::GitAccess.new(user, project).can_push_to_branch?(target_branch)
+    ::Gitlab::GitAccess.new(user, project, 'web').can_push_to_branch?(target_branch)
   end
 
   def mergeable_ci_state?

app/services/commits/change_service.rb

@@ -23,7 +23,7 @@ module Commits
     private
 
     def check_push_permissions
-      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(@target_branch)
+      allowed = ::Gitlab::GitAccess.new(current_user, project, 'web').can_push_to_branch?(@target_branch)
 
       unless allowed
         raise ValidationError.new('You are not allowed to push into this branch')

app/services/files/base_service.rb

@@ -43,7 +43,7 @@ module Files
     end
 
     def validate
-      allowed = ::Gitlab::GitAccess.new(current_user, project).can_push_to_branch?(@target_branch)
+      allowed = ::Gitlab::GitAccess.new(current_user, project, 'web').can_push_to_branch?(@target_branch)
 
       unless allowed
         raise_error("You are not allowed to push into this branch")

lib/gitlab/git_access.rb

@@ -5,7 +5,7 @@ module Gitlab
 
     attr_reader :actor, :project, :protocol
 
-    def initialize(actor, project, protocol = 'web')
+    def initialize(actor, project, protocol)
       @actor    = actor
       @project  = project
       @protocol = protocol

spec/lib/gitlab/git_access_spec.rb

@@ -1,7 +1,7 @@
 require 'spec_helper'
 
 describe Gitlab::GitAccess, lib: true do
-  let(:access) { Gitlab::GitAccess.new(actor, project) }
+  let(:access) { Gitlab::GitAccess.new(actor, project, 'web') }
   let(:project) { create(:project) }
   let(:user) { create(:user) }
   let(:actor) { user }