Revert "Fix issues with &await given conted Iterables"

This reverts commit c51f179.

Per: https://irclog.perlgeek.de/moarvm/2017-12-20#i_15604339
+1 on not bending over backwards to DWIM with deconts for the user

src/core.d/await.pm

@@ -32,17 +32,15 @@ multi sub await(Iterable:D \i) {
             ($_ but X::Await::Died(Backtrace.new(5))).rethrow
         }
     }
-    # decont and flatten nested iterables
-    $*AWAITER.await-all: gather { i».take }
+    $*AWAITER.await-all(i)
 }
 multi sub await(*@awaitables) {
     CATCH {
         unless nqp::istype($_, X::Await::Died) {
             ($_ but X::Await::Died(Backtrace.new(5))).rethrow
         }
     }
-    # decont and flatten nested iterables
-    $*AWAITER.await-all: gather { @awaitables».take }
+    $*AWAITER.await-all(@awaitables)
 }
 
 my role X::React::Died {

src/core/asyncops.pm

@@ -50,8 +50,8 @@ multi sub await(Supply:D $s) {
     my $*RAKUDO-AWAIT-BLOCKING := True;
     $*AWAITER.await($s)
 }
-multi sub await(Iterable:D $i) { eager $i.eager.map({ await $_ }) }
-multi sub await(*@awaitables)  { eager @awaitables.eager.map({await $_}) }
+multi sub await(Iterable:D $i) { $i.eager.map({ await $_ }) }
+multi sub await(*@awaitables)  { @awaitables.eager.map({await $_}) }
 
 sub awaiterator(@promises) {
     Seq.new(class :: does Iterator {