Removing bower, as even they now recommend to use yarn and webpack

Author: weaverryan

_build/redirection_map

@@ -162,7 +162,7 @@
 /cookbook/form/inherit_data_option /form/inherit_data_option
 /cookbook/form/unit_testing /form/unit_testing
 /cookbook/form/use_empty_data /form/use_empty_data
-/cookbook/frontend/bower /frontend/bower
+/cookbook/frontend/bower /frontend
 /cookbook/frontend/index /frontend
 /cookbook/install/unstable_versions /setup/unstable_versions
 /cookbook/install/bundles /setup/bundles