code: public static UsingPath dropPrimaryIndex(String namespace, String keyspace) {
          return new DefaultDropPath().dropPrimary(namespace, keyspace);
      }
docs: Drop the primary index of the given namespace:keyspace.
  
  @param namespace the namespace prefix (will be escaped).
  @param keyspace the keyspace (bucket, will be escaped).
  @see #dropNamedPrimaryIndex(String, String, String) if the primary index name has been customized.