The attributes are part of the Managed Objects Attributes in Identity Portal Admin UI.
Identity Portal 14.x (Virtual Appliance or Standalone)
From Identity Portal, Admin UI remove the attributes you do not want to be visible in the developer tools from Identity Portal Admin UI > Setup > Managed Object Attributes
After that, clear the cache in the Identity Portal Admin.
Note: While trying to remove you can get a message that the attribute is part of Search, in this case you must remove it from the Search before removing it from Managed Object Attributes