Revert "Disable Feedv2 build flag on canary"

This reverts commit dd9ec5b7.

Reason for revert: This was a temporary change to get some data.

Original change's description:
> Disable Feedv2 build flag on canary
> 
> Bug: 1119406
> Change-Id: Ib6e64db692a264036d48ca168f434cfe38f534b6
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2412549
> Commit-Queue: Dan H <harringtond@chromium.org>
> Auto-Submit: Dan H <harringtond@chromium.org>
> Reviewed-by: Justin DeWitt <dewittj@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#807154}

TBR=dewittj@chromium.org,harringtond@chromium.org

Change-Id: I991b9fe55068363b667e087caf10b4c66233de54
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1119406
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2414554Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Commit-Queue: Justin DeWitt <dewittj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807579}

components/feed/features.gni

@@ -2,11 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//chrome/android/channel.gni")
-
 declare_args() {
   enable_feed_in_chrome = is_android
-
-  # TODO(crbug.com/1119406): Temporarily disable on canary for testing.
-  enable_feed_v2 = is_android && android_channel != "canary"
+  enable_feed_v2 = is_android
 }