Update controller to use simple redirect

Now that the form is submitting with a normal post,
We can remove all of the js handling.

We replace the `format` calls with a simple redirect.

And finally remove update.js.haml as it is no longer used.

app/controllers/projects_controller.rb

@@ -90,22 +90,14 @@ class ProjectsController < Projects::ApplicationController
     # Refresh the repo in case anything changed
     @repository = @project.repository
 
-    respond_to do |format|
-      if result[:status] == :success
-        flash[:notice] = _("Project '%{project_name}' was successfully updated.") % { project_name: @project.name }
-
-        format.html do
-          redirect_to(edit_project_path(@project, anchor: 'js-general-project-settings'))
-        end
-      else
-        flash[:alert] = result[:message]
-        @project.reset
-
-        format.html { render_edit }
-      end
-
-      format.js
+    if result[:status] == :success
+      flash[:notice] = _("Project '%{project_name}' was successfully updated.") % { project_name: @project.name }
+    else
+      flash[:alert] = result[:message]
+      @project.reset
     end
+    
+    redirect_to(edit_project_path(@project, anchor: 'js-general-project-settings'))
   end
 
   # rubocop: disable CodeReuse/ActiveRecord

app/views/projects/update.js.haml

-- if @project.valid?
-  :plain
-    location.href = "#{edit_project_path(@project, anchor: params[:update_section])}";
-    location.reload();
-- else
-  :plain
-    $(".flash-container").html("#{escape_javascript(render('errors'))}");
-    $('.save-project-loader').hide();
-    $('.project-edit-container').show();
-    $('.edit-project .js-btn-success-general-project-settings').enable();