Add comments count component

Remove all the translations that are left over after having unified them
in the component.

spec/components/shared/comments_count_component_spec.rb

@@ -0,0 +1,17 @@
+require "rails_helper"
+
+describe Shared::CommentsCountComponent do
+  it "renders a link when a URL is given" do
+    render_inline Shared::CommentsCountComponent.new(0, url: "http://www.url.com")
+
+    expect(page.find(".comments-count")).to have_content "No comments"
+    expect(page.find(".comments-count")).to have_link "No comments", href: "http://www.url.com"
+  end
+
+  it "renders plain text when no URL is given" do
+    render_inline Shared::CommentsCountComponent.new(1)
+
+    expect(page.find(".comments-count")).to have_content "1 comment"
+    expect(page.find(".comments-count")).not_to have_link "1 comment"
+  end
+end