Remove returns from InvokeWithoutArgs's callbacks.

Bug: None
Change-Id: I1d484f584c61d3bb8e2416378379cf2442dd03ed
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/489840
Owners-Override: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#48199}

modules/rtp_rtcp/source/rtcp_transceiver_unittest.cc

diff --git a/modules/rtp_rtcp/source/rtcp_transceiver_unittest.cc b/modules/rtp_rtcp/source/rtcp_transceiver_unittest.cc
index 6f53aef..32e2bda 100644
--- a/modules/rtp_rtcp/source/rtcp_transceiver_unittest.cc
+++ b/modules/rtp_rtcp/source/rtcp_transceiver_unittest.cc
@@ -71,7 +71,6 @@
   config.task_queue = queue.Get();
   EXPECT_CALL(outgoing_transport, Call).WillRepeatedly(InvokeWithoutArgs([&] {
     EXPECT_TRUE(queue.IsCurrent());
-    return true;
   }));
 
   RtcpTransceiver rtcp_transceiver(config);
@@ -89,7 +88,6 @@
   config.task_queue = queue.Get();
   EXPECT_CALL(outgoing_transport, Call).WillRepeatedly(InvokeWithoutArgs([&] {
     EXPECT_TRUE(queue.IsCurrent());
-    return true;
   }));
 
   std::unique_ptr<RtcpTransceiver> rtcp_transceiver;
@@ -236,10 +234,8 @@
   EXPECT_CALL(outgoing_transport, Call)
       // If test is slow, a periodic task may send an extra packet.
       .Times(AtLeast(3))
-      .WillRepeatedly(InvokeWithoutArgs([&] {
-        EXPECT_TRUE(queue.IsCurrent());
-        return true;
-      }));
+      .WillRepeatedly(
+          InvokeWithoutArgs([&] { EXPECT_TRUE(queue.IsCurrent()); }));
 
   RtcpTransceiver rtcp_transceiver(config);