Remove heap settings from pub scripts for SDK too.

sdk/bin/pub_sdk

 #!/bin/bash
 # Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 # Run pub.dart on the Dart VM. This script assumes the Dart SDK's directory
 # structure.
 
 function follow_links() {
   file="$1"
   while [ -h "$file" ]; do
     # On Mac OS, readlink -f doesn't work.
     file="$(readlink "$file")"
   done
   echo "$file"
 }
 
 # Unlike $0, $BASH_SOURCE points to the absolute path of this file.
 PROG_NAME="$(follow_links "$BASH_SOURCE")"
 
 # Handle the case where dart-sdk/bin has been symlinked to.
 BIN_DIR="$(cd "${PROG_NAME%/*}" ; pwd -P)"
 
 SNAPSHOT="$BIN_DIR/snapshots/pub.dart.snapshot"
 
 unset VM_OPTIONS
 declare -a VM_OPTIONS
 
-# Give the VM extra memory for dart2js.
-# TODO(rnystrom): Remove when #8355 is fixed.
-VM_OPTIONS+=("--old_gen_heap_size=1024")
-
 # Allow extra VM options to be passed in through an environment variable.
 if [[ $DART_VM_OPTIONS ]]; then
   read -a OPTIONS <<< "$DART_VM_OPTIONS"
   VM_OPTIONS+=("${OPTIONS[@]}")
 fi
 
 # Run the pub snapshot.
 DART="$BIN_DIR/dart"
 exec "$DART" "${VM_OPTIONS[@]}" "$SNAPSHOT" "$@"