Remove VoECodec

voice_engine/BUILD.gn

Index: voice_engine/BUILD.gn
diff --git a/voice_engine/BUILD.gn b/voice_engine/BUILD.gn
index 57a94e2a03ab51b2ea8ca3dc2ce76b9e36ffc33d..5f1ae034ca47fd583114a3bccb8f2c2e1d429cea 100644
--- a/voice_engine/BUILD.gn
+++ b/voice_engine/BUILD.gn
@@ -17,7 +17,6 @@ rtc_static_library("voice_engine") {
     "channel_proxy.cc",
     "channel_proxy.h",
     "include/voe_base.h",
-    "include/voe_codec.h",
     "include/voe_errors.h",
     "include/voe_network.h",
     "include/voe_rtp_rtcp.h",
@@ -36,8 +35,6 @@ rtc_static_library("voice_engine") {
     "utility.h",
     "voe_base_impl.cc",
     "voe_base_impl.h",
-    "voe_codec_impl.cc",
-    "voe_codec_impl.h",
     "voe_network_impl.cc",
     "voe_network_impl.h",
     "voe_rtp_rtcp_impl.cc",
@@ -145,7 +142,6 @@ if (rtc_include_tests) {
       "transport_feedback_packet_loss_tracker_unittest.cc",
       "utility_unittest.cc",
       "voe_base_unittest.cc",
-      "voe_codec_unittest.cc",
       "voe_network_unittest.cc",
       "voice_engine_fixture.cc",
       "voice_engine_fixture.h",