Remove ajax form handling

This page reloads on submit anyway. Using ajax here does nothing.
So we remove `remote: true` to make rails handle this form normally.

app/views/projects/edit.html.haml

@@ -19,7 +19,7 @@
     %p= _('Choose visibility level, enable/disable project features and their permissions, disable email notifications, and show default award emoji.')
 
   .settings-content
-    = form_for @project, remote: true, html: { multipart: true, class: "sharing-permissions-form" }, authenticity_token: true do |f|
+    = form_for @project, html: { multipart: true, class: "sharing-permissions-form" }, authenticity_token: true do |f|
       %input{ name: 'update_section', type: 'hidden', value: 'js-shared-permissions' }
       %template.js-project-permissions-form-data{ type: "application/json" }= project_permissions_panel_data_json(@project)
       .js-project-permissions-form
@@ -36,7 +36,7 @@
   .settings-content
     = render_if_exists 'shared/promotions/promote_mr_features'
 
-    = form_for @project, remote: true, html: { multipart: true, class: "merge-request-settings-form js-mr-settings-form" }, authenticity_token: true do |f|
+    = form_for @project, html: { multipart: true, class: "merge-request-settings-form js-mr-settings-form" }, authenticity_token: true do |f|
       %input{ name: 'update_section', type: 'hidden', value: 'js-merge-request-settings' }
       = render 'projects/merge_request_settings', form: f
       = f.submit _('Save changes'), class: "btn gl-button btn-success rspec-save-merge-request-changes", data: { qa_selector: 'save_merge_request_changes_button' }

app/views/projects/settings/_general.html.haml

-= form_for [@project], remote: true, html: { multipart: true, class: "edit-project js-general-settings-form" }, authenticity_token: true do |f|
+= form_for [@project], html: { multipart: true, class: "edit-project js-general-settings-form" }, authenticity_token: true do |f|
   %input{ name: 'update_section', type: 'hidden', value: 'js-general-settings' }
   = form_errors(@project)
 

ee/app/views/projects/_merge_request_approvals_settings.html.haml

@@ -10,7 +10,7 @@
       = link_to _("Learn more."), help_page_path("user/project/merge_requests/merge_request_approvals"), target: '_blank'
 
   .settings-content
-    = form_for @project, remote: true, html: { class: "merge-request-approval-settings-form js-mr-approvals-form" }, authenticity_token: true do |f|
+    = form_for @project, html: { class: "merge-request-approval-settings-form js-mr-approvals-form" }, authenticity_token: true do |f|
       %input{ name: 'update_section', type: 'hidden', value: 'js-merge-request-approval-settings' }
       = render 'projects/merge_request_approvals_settings_form', form: f, project: @project
       = f.submit _("Save changes"), class: "btn gl-button btn-success gl-mt-4", data: { qa_selector: 'save_merge_request_approval_settings_button' }

ee/app/views/projects/settings/_default_issue_template.html.haml

@@ -8,7 +8,7 @@
       %p#issue-settings-default-template-label= _('Set a default description template to be used for new issues. %{link_start}What are description templates?%{link_end}').html_safe % { link_start: link_start, link_end: '</a>'.html_safe }
 
     .settings-content
-      = form_for @project, remote: true, html: { multipart: true, class: "issue-settings-form" }, authenticity_token: true do |f|
+      = form_for @project, html: { multipart: true, class: "issue-settings-form" }, authenticity_token: true do |f|
         %input{ type: 'hidden', name: 'update_section', value: 'js-issue-settings' }
         .row
           .form-group.col-md-9