Removes parts of the VoEBase sub API as part of a clean-up operation where the goal is to remove unused APIs.

BUG=3206
R=henrik.lundin@webrtc.org, juberti@webrtc.org, niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12019005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5928 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/common_types.h b/common_types.h
index c566f6b..68f2baa 100644
--- a/common_types.h
+++ b/common_types.h
@@ -466,6 +466,7 @@
     kAudioLinuxPulse = 4
 };
 
+// TODO(henrika): to be removed.
 enum NetEqModes             // NetEQ playout configurations
 {
     // Optimized trade-off between low delay and jitter robustness for two-way
@@ -482,6 +483,7 @@
     kNetEqOff = 3,
 };
 
+// TODO(henrika): to be removed.
 enum OnHoldModes            // On Hold direction
 {
     kHoldSendAndPlay = 0,    // Put both sending and playing in on-hold state.
@@ -489,6 +491,7 @@
     kHoldPlayOnly            // Put only playing in on-hold state.
 };
 
+// TODO(henrika): to be removed.
 enum AmrMode
 {
     kRfc3267BwEfficient = 0,