Revert "Fix Any.skip: *-1 crash"

This reverts commit 44ff0a2.
.tail(Callable) is not equivalent to .skip(Callable); spectest
from master branch catching this was not yet pulled into postrelease
branch when this commit was applied, so nothing was caught

src/core/Any-iterable-methods.pm

@@ -1844,7 +1844,7 @@ Did you mean to add a stub (\{...\}) or did you mean to .classify?"
     }
 
     proto method tail(|) {*}
-    multi method tail() is raw {
+    multi method tail(Any:D:) is raw {
         nqp::if(
           nqp::eqaddr((my $pulled :=
             Rakudo::Iterator.LastValue(self.iterator,'tail')),
@@ -1854,7 +1854,7 @@ Did you mean to add a stub (\{...\}) or did you mean to .classify?"
           $pulled
         )
     }
-    multi method tail($n) {
+    multi method tail(Any:D: $n) {
         Seq.new(
           nqp::if(
             nqp::istype($n,Callable),
@@ -1875,7 +1875,13 @@ Did you mean to add a stub (\{...\}) or did you mean to .classify?"
         Seq.new( $iter.skip-one ?? $iter !! Rakudo::Iterator.Empty )
     }
     multi method skip(Whatever) { Seq.new(Rakudo::Iterator.Empty) }
-    multi method skip(Callable:D \w) { self.tail: w }
+    multi method skip(Callable:D $w) {
+       nqp::if(
+         nqp::isgt_i((my $tail := -($w(0).Int)),0),
+         self.tail($tail),
+         Seq.new(Rakudo::Iterator.Empty)
+       )
+    }
     multi method skip(Int() $n) {
         my $iter := self.iterator;
         Seq.new( $iter.skip-at-least($n) ?? $iter !! Rakudo::Iterator.Empty )