Drop one of duplicated classname from Project

limit-container-width classname is duplicated in two of the parent
and child elements.  As the child element is not relevant to any of
CSS rules, we can safely remove the child element to reduce DOM size.
Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

app/views/projects/show.html.haml

@@ -7,22 +7,21 @@
 
 = render partial: 'flash_messages', locals: { project: @project }
 
-%div{ class: [("limit-container-width" unless fluid_layout)] }
-  = render "projects/last_push"
+= render "projects/last_push"
 
-  = render "home_panel"
+= render "home_panel"
 
-  - if can?(current_user, :download_code, @project) && @project.repository_languages.present?
-    = repository_languages_bar(@project.repository_languages)
+- if can?(current_user, :download_code, @project) && @project.repository_languages.present?
+  = repository_languages_bar(@project.repository_languages)
 
-  = render "archived_notice", project: @project
-  = render_if_exists "projects/marked_for_deletion_notice", project: @project
-  = render_if_exists "projects/ancestor_group_marked_for_deletion_notice", project: @project
+= render "archived_notice", project: @project
+= render_if_exists "projects/marked_for_deletion_notice", project: @project
+= render_if_exists "projects/ancestor_group_marked_for_deletion_notice", project: @project
 
-  - view_path = @project.default_view
+- view_path = @project.default_view
 
-  - if show_auto_devops_callout?(@project)
-    = render 'shared/auto_devops_callout'
+- if show_auto_devops_callout?(@project)
+  = render 'shared/auto_devops_callout'
 
-  %div{ class: project_child_container_class(view_path) }
-    = render view_path, is_project_overview: true
+%div{ class: project_child_container_class(view_path) }
+  = render view_path, is_project_overview: true

changelogs/unreleased/drop-limit-container-width-from-project.yml

+---
+title: Drop one of duplicated classname from Project
+merge_request: 41830
+author: Takuya Noguchi
+type: performance