Delete AudioCodingModule::LeastRequiredDelayMs and related NetEq code.

Bug: None
Change-Id: I2f68502d19415899b3694f7bf5da523da831b223
Reviewed-on: https://webrtc-review.googlesource.com/95640
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24439}

modules/audio_coding/neteq/include/neteq.h

@@ -180,12 +180,6 @@ class NetEq {
   // the |max_delay_ms| value in the NetEq::Config struct.
   virtual bool SetMaximumDelay(int delay_ms) = 0;
 
-  // The smallest latency required. This is computed bases on inter-arrival
-  // time and internal NetEq logic. Note that in computing this latency none of
-  // the user defined limits (applied by calling setMinimumDelay() and/or
-  // SetMaximumDelay()) are applied.
-  virtual int LeastRequiredDelayMs() const = 0;
-
   // Not implemented.
   virtual int SetTargetDelay() = 0;