remove unnecessary argument from base component doc & test

Author: pascalwengerter

docs/concepts/component.md

@@ -861,7 +861,7 @@ class Pages::ExamplePage < Page::Cell::Page
   def response
     components {
       div id: "div-on-page" do
-        custom_static_component "foo from page"
+        custom_static_component
       end
     }
   end

spec/usage/base/component_spec.rb

@@ -846,7 +846,7 @@ class ExamplePage < Page::Cell::Page
         def response
           components {
             div id: "div-on-page" do
-              static_component "foo from page"
+              static_component
             end
           }
         end