Cleans up double classes and regex mishaps

- Removes double `btn` classes
- Fixes omniauth issues with regex matches
- Removes the accidental changes to the ee dir

app/views/devise/shared/_experimental_separate_sign_up_flow_omniauth_box.haml

@@ -6,7 +6,7 @@
 .d-flex.justify-content-between.flex-wrap
   - providers.each do |provider|
     - has_icon = provider_has_icon?(provider)
-    = link_to omniauth_authorize_path(:user, provider), method: :post, class: "btn d-flex align-items-center omniauth-gl-button btn text-left oauth-login mb-2 p-2 #{qa_class_for_provider(provider)}", id: "oauth-login-#{provider}" do
+    = link_to omniauth_authorize_path(:user, provider), method: :post, class: "gl-button btn d-flex align-items-center omniauth-btn text-left oauth-login mb-2 p-2 #{qa_class_for_provider(provider)}", id: "oauth-login-#{provider}" do
       - if has_icon
         = provider_image_tag(provider)
       %span.ml-2

app/views/devise/shared/_omniauth_box.html.haml

@@ -7,7 +7,7 @@
   .d-flex.justify-content-between.flex-wrap
     - providers.each do |provider|
       - has_icon = provider_has_icon?(provider)
-      = button_to omniauth_authorize_path(:user, provider), id: "oauth-login-#{provider}", class: "btn d-flex align-items-center omniauth-gl-button btn text-left oauth-login #{qa_class_for_provider(provider)}" do
+      = button_to omniauth_authorize_path(:user, provider), id: "oauth-login-#{provider}", class: "gl-button btn d-flex align-items-center omniauth-btn text-left oauth-login #{qa_class_for_provider(provider)}" do
         - if has_icon
           = provider_image_tag(provider)
         %span

app/views/doorkeeper/applications/show.html.haml

@@ -16,7 +16,7 @@
           .input-group
             %input.label.label-monospace.monospace{ id: "application_id", type: "text", autocomplete: 'off', value: @application.uid, readonly: true }
             .input-group-append
-              = clipboard_button(target: '#application_id', title: _("Copy ID"), class: "btn gl-button btn btn-default")
+              = clipboard_button(target: '#application_id', title: _("Copy ID"), class: "gl-button btn btn-default")
     %tr
       %td
         = _('Secret')
@@ -25,7 +25,7 @@
           .input-group
             %input.label.label-monospace.monospace{ id: "secret", type: "text", autocomplete: 'off', value: @application.secret, readonly: true }
             .input-group-append
-              = clipboard_button(target: '#secret', title: _("Copy secret"), class: "btn gl-button btn btn-default")
+              = clipboard_button(target: '#secret', title: _("Copy secret"), class: "gl-button btn btn-default")
     %tr
       %td
         = _('Callback URL')

ee/app/views/dashboard/projects/_blank_state_ee_trial.html.haml

@@ -12,5 +12,5 @@
         = link_to "paid products", "https://about.gitlab.com/pricing/", target: "_blank", rel: "noopener noreferrer nofollow"
       You can try Ultimate for free without
       any obligation or payment details.
-    = link_to new_trial_url, class: "gl-button btn btn-success" do
+    = link_to new_trial_url, class: "btn btn-success" do
       Start free trial

ee/app/views/devise/sessions/_new_smartcard.html.haml

@@ -3,4 +3,4 @@
     .login-body
       = form_tag(auth_smartcard_url, html: { 'aria-live' => 'assertive'}) do
         .submit-container
-          = submit_tag _('Login with smartcard'), class: 'gl-button btn btn-success'
+          = submit_tag _('Login with smartcard'), class: 'btn btn-success'