Remove invalid Pod

S26 states:
After the typename, the rest of the C<=begin> marker line is treated as
configuration information for the block. This information is used in
different ways by different types of blocks, but is always specified
using Perl6-ish option pairs.

We don't parse the block configuration information yet, plus they're not
needed anyway there.

src/core/Enum.pm

@@ -1,6 +1,7 @@
 augment class Enum {
 
-=begin item ACCEPTS()
+=begin item
+ACCEPTS()
 
 Called from smartmatches '$_ ~~ X'.
 
@@ -20,7 +21,8 @@ Else it delegates to a  method call '.:Xkey(Xval)'
         return (?$topic."$meth_name"()) === (?$.value);
     }
 
-=begin item fmt
+=begin item
+fmt
 
   our Str multi Pair::fmt ( Str $format = "%s\t%s" )
 
@@ -32,7 +34,8 @@ the key and value.
         return sprintf($format, $.key, $.value);
     }
 
-=begin item kv
+=begin item
+kv
 
 Return key and value as a 2-element List.
 
@@ -41,7 +44,8 @@ Return key and value as a 2-element List.
         ($.key, $.value);
     }
 
-=begin item pairs
+=begin item
+pairs
 
 =end item
     method pairs() {

src/core/Routine.pm

@@ -1,7 +1,7 @@
 augment class Routine {
 
-=begin item cando
-
+=begin item
+cando
 =end item
     method cando(Capture $capture) {
         my @candidates = self.candidates;
@@ -12,8 +12,8 @@ augment class Routine {
         @can
     }
 
-=begin item candidates
-
+=begin item
+candidates
 =end item
     method candidates() {
         @(self)