Remove a PAE for a WAT that the GLR eliminated

Author: skids

doc/Language/traps.pod

@@ -157,35 +157,6 @@ Instead, use an expression that produces a value when you want a value.
 
 =head1 Arrays
 
-=head2 Number of elements in an array when assigning the empty array
-
-Assigning an empty array to an array saves the empty array as an item in the
-array.  This is why the number of elements will turn out to be 1 instead of
-zero as might be expected by the unwary.
-
-    my @array = [];    # assigns empty array as an item in @array
-    say @array.elems;  #-> 1
-
-Whereas querying the number of elements of the empty array directly returns
-zero as expected:
-
-    say [].elems;      #-> 0
-
-This can be more clearly seen by calling the C<.perl> method on the object:
-
-    my @array = [];
-    say @array.perl;   #-> Array.new([])  # an array containing an empty array
-
-in contrast to:
-
-    my @array = ();
-    say @array.perl;   #-> Array.new()    # a truly empty array
-
-Note that this is I<also> the behaviour in Perl 5:
-
-    perl -E "say scalar(my @array = [])"  #-> 1
-    perl -E "say scalar(my @array = ())"  #-> 0
-
 =head2 Referencing the last element of an array
 
 In Perl 5 one could reference the last element of an array by asking for the