Remove obsolete sdp string munging

Author: jim-signal

ringrtc/rffi/BUILD.gn

@@ -58,7 +58,6 @@ if (is_android) {
       "${android_sdk}:libjingle_peerconnection_jni",
       "${android_sdk}:libjingle_peerconnection_metrics_default_jni",
       "//pc:libjingle_peerconnection",
-      "//third_party/re2",
     ]
     output_extension = "so"
   }
@@ -78,7 +77,6 @@ if (is_ios) {
 
     deps = [
       "//third_party/libyuv",
-      "//third_party/re2",
     ]
   }
 }
@@ -94,7 +92,6 @@ if (is_linux || is_mac || is_win) {
     deps = [
       "//sdk:media_constraints",
       "//media:rtc_simulcast_encoder_adapter",
-      "//third_party/re2",
     ]
   }
 }

ringrtc/rffi/src/sdp_observer.cc

@@ -7,7 +7,6 @@
 
 #include "rffi/api/sdp_observer_intf.h"
 #include "rffi/src/ptr.h"
-#include "third_party/re2/src/re2/re2.h"
 
 namespace webrtc {
 namespace rffi {
@@ -30,13 +29,8 @@ void CreateSessionDescriptionObserverRffi::OnSuccess(
   // OnSuccess transfers ownership of the description
   RTC_LOG(LS_INFO) << "CreateSessionDescriptionObserverRffi:OnSuccess(): ";
 
-  // TODO tweak the response a little
   std::string sdp;
   if (session_description->ToString(&sdp)) {
-    static LazyRE2 ssrc_re = {
-        ".+urn:ietf:params:rtp-hdrext:ssrc-audio-level.*\r?\n"};
-    RE2::Replace(&sdp, *ssrc_re, "");
-
     std::unique_ptr<SessionDescriptionInterface> session_description2 =
         CreateSessionDescription(session_description->GetType(), sdp);
     delete session_description;

tools_webrtc/libs/generate_licenses.py

@@ -80,8 +80,6 @@
     'jni_zero': ['third_party/jni_zero/LICENSE'],
     'protobuf-javascript': ['third_party/protobuf-javascript/LICENSE'],
     'perfetto': ['third_party/perfetto/LICENSE'],
-    # RingRTC change to use RE2 for rffi
-    're2': ['third_party/re2/LICENSE'],
     # TODO(bugs.webrtc.org/1110): Remove this hack. This is not a lib.
     # For some reason it is listed as so in _get_third_party_libraries.
     'android_deps': [],