Remove unnecessary word

@Altai-man++

Author: AlexDaniel

doc/Language/containers.pod6

@@ -167,7 +167,7 @@ bind (whether C<=> or C<:=> is used):
 
 There are a number of positional container types with slightly different
 semantics in Perl 6. The most basic one is L<List|/type/List>, which
-it is created by the comma operator.
+is created by the comma operator.
 
     say (1, 2, 3).^name;    # OUTPUT: «List␤»