kill abs and sleep as prefixes

they live on as normal subroutines

S03-operators.pod

@@ -14,8 +14,8 @@ Synopsis 3: Perl 6 Operators
 
     Created: 8 Mar 2004
 
-    Last Modified: 27 June 2012
-    Version: 254
+    Last Modified: 20 July 2012
+    Version: 255
 
 =head1 Overview
 
@@ -265,7 +265,6 @@ a function call even if that identifier also has a prefix meaning,
 so you never have to worry about precedence in that case.  Hence:
 
     not($x) + 1         # means (not $x) + 1
-    abs($x) + 1         # means (abs $x) + 1
 
 =item *
 
@@ -1150,32 +1149,6 @@ In other words:
 
 is a syntax error (two terms in a row), because C<int> is a type name now.
 
-=over
-
-=item *
-
-C<< prefix:<int> >>
-
-Deprecated, use the C<Int()> coercion or the C<floor> function.
-
-=item *
-
-C<< prefix:<sleep> >>
-
-Coerces to an appropriate C<Real> type, then suspends the current
-thread of execution for the specified number of seconds, which
-may be fractional.  Remember that although a C<Rat> is capable
-of attosecond precision, your computer is probably not capable of
-attosecond accuracy.
-
-=item *
-
-C<< prefix:<abs> >>
-
-Returns the absolute value of the specified argument.
-
-=back
-
 =head2 Nonchaining binary precedence
 
 =over