Remove deprecated support passing path as `nil` in `ActionDispatch::Routing::Mapper#match`

actionpack/CHANGELOG.md

+*   Remove deprecated support passing path as `nil` in `ActionDispatch::Routing::Mapper#match`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated `cache_control` argument from `ActionDispatch::Static#initialize`.
 
     *Rafael Mendonça França*

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -1558,11 +1558,7 @@ def match(path, *rest, &block)
             options  = path
             path, to = options.find { |name, _value| name.is_a?(String) }
 
-            if path.nil?
-              ActiveSupport::Deprecation.warn "Omitting the route path is deprecated. "\
-                "Specify the path with a String or a Symbol instead."
-              path = ""
-            end
+            raise ArgumentError, "Route path not specified" if path.nil?
 
             case to
             when Symbol

actionpack/test/dispatch/routing_test.rb

@@ -373,9 +373,7 @@ def test_pagemarks
         post "create", as: ""
         put  "update"
         get  "remove", action: :destroy, as: :remove
-        tc.assert_deprecated do
-          get action: :show, as: :show
-        end
+        get "", action: :show, as: :show
       end
     end