Add unschedule endpont to job controller

app/controllers/projects/jobs_controller.rb

@@ -110,6 +110,13 @@ class Projects::JobsController < Projects::ApplicationController
     redirect_to build_path(@build)
   end
 
+  def unschedule
+    return respond_422 unless @build.scheduled?
+
+    @build.unschedule
+    redirect_to build_path(@build)
+  end
+
   def status
     render json: BuildSerializer
       .new(project: @project, current_user: @current_user)

config/routes/project.rb

@@ -275,6 +275,7 @@ constraints(::Constraints::ProjectUrlConstrainer.new) do
           member do
             get :status
             post :cancel
+            post :unschedule
             post :retry
             post :play
             post :erase