Update README.md and codereview.settings for new source location

TBR=kjellander@webrtc.org

Bug: 738330
Change-Id: I5eb87ee2d08f4be73f00ebf9771b8f7c08dbadd3
Reviewed-on: https://webrtc-review.googlesource.com/1020
Commit-Queue: Aaron Gable <agable@chromium.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Reviewed-by: Edward Lemur <ehmaldonado@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19826}
diff --git a/codereview.settings b/codereview.settings
index c96f22c..81fb591 100644
--- a/codereview.settings
+++ b/codereview.settings
@@ -1,10 +1,5 @@
-# This file is used by gcl to get repository specific information.
-CODE_REVIEW_SERVER: codereview.webrtc.org
+# This file is used by git-cl to get repository specific information.
 CC_LIST: webrtc-reviews@webrtc.org
-VIEW_VC: https://chromium.googlesource.com/external/webrtc/+/
-TRY_ON_UPLOAD: False
-TRYSERVER_SVN_URL: svn://svn.chromium.org/chrome-try/try-webrtc
-TRYSERVER_PROJECT: webrtc
-TRYSERVER_ROOT: src
+CODE_REVIEW_SERVER: codereview.webrtc.org
 PROJECT: webrtc
-PENDING_REF_PREFIX: refs/pending/
+VIEW_VC: https://webrtc.googlesource.com/src/+/