remove leftover conflict marker

Author: gfldex

doc/Type/Hash.pod6

@@ -366,7 +366,6 @@ Defined as:
 
     method append(+@values)
 
-<<<<<<< Updated upstream
 Append the provided Pairs or even sized list to the Hash. If a key already
 exists, turn the existing value into an L<Array|/type/Array> and push new value
 onto that C<Array>. Please note that you can't mix even sized lists and lists