Follow-up: Remove old DelayCorrection AEC config

talk/app/webrtc/localaudiosource.cc

Index: talk/app/webrtc/localaudiosource.cc
diff --git a/talk/app/webrtc/localaudiosource.cc b/talk/app/webrtc/localaudiosource.cc
index 3d4412b3cecfd2657251cce0274e9a6643c099fe..63c6f13a3d7baa6a7f10411f30c82be6536dbf98 100644
--- a/talk/app/webrtc/localaudiosource.cc
+++ b/talk/app/webrtc/localaudiosource.cc
@@ -53,14 +53,6 @@ void FromConstraints(const MediaConstraintsInterface::Constraints& constraints,
   } key_to_value[] = {
       {MediaConstraintsInterface::kGoogEchoCancellation,
        options->echo_cancellation},
-      // Both kExperimentalEchoCancellation (old) and
-      // kExtendedFilterEchoCancellation (new) translate to
-      // extended_filter_aec
-      // option being set. This is to manage the transition from the old to
-      // the
-      // new without breaking dependent code.
-      {MediaConstraintsInterface::kExperimentalEchoCancellation,
-       options->extended_filter_aec},
       {MediaConstraintsInterface::kExtendedFilterEchoCancellation,
        options->extended_filter_aec},
       {MediaConstraintsInterface::kDAEchoCancellation,