Remove external project ID

If we _do_ integrate with an external service, a different plugin should
add that.

Resolves #2164

app/controllers/jobs_controller.rb

@@ -50,7 +50,6 @@ class JobsController < ApplicationController
       :ends_on,
       :project_id,
       :budget,
-      :external_project_id,
       :name,
       :description,
       time_budgets_attributes: [:id, :activity_id, :hours, :job_id, :_destroy]

app/views/jobs/_form.html.erb

@@ -19,10 +19,6 @@
 
     <%= f.hidden_field :project_id, value: @job.project.id %>
 
-    <p>
-    <%= f.label :external_project_id %>
-    <%= f.number_field :external_project_id %>
-
     <fieldset>
       <legend>Budget</legend>
       <%= f.fields_for :time_budgets do |ff| %>

app/views/jobs/_job.html.erb

@@ -3,7 +3,6 @@
   <td><%= format_date(job.starts_on) %></td>
   <td><%= format_date(job.ends_on) %></td>
   <td><%= job.project_id %></td>
-  <td><%= job.external_project_id %></td>
   <td>
     <%= l_hours_short(job.total_time_budget) %>
   </td>

app/views/jobs/show.html.erb

@@ -18,8 +18,6 @@
           <div class="value"><%= format_date(@job.starts_on) %></div>
           <div class="label">Ends on:</div>
           <div class="value"><%= format_date(@job.starts_on) %></div>
-          <div class="label">External project ID:</div>
-          <div class="value"><%= @job.external_project_id %></div>
         </div>
       </div>
       <div class="splitcontentright">

db/migrate/20231128162810_remove_external_project_id_from_jobs.rb

@@ -0,0 +1,5 @@
+class RemoveExternalProjectIdFromJobs < ActiveRecord::Migration[6.1]
+  def change
+    remove_column :jobs, :external_project_id, :integer
+  end
+end