Fix -Wunused-but-set-variable.

Bug: None
Change-Id: I8943227108e46c4c942895e4bd8fb276947502e0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/236525
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Reviewed-by: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Henrik Lundin <henrik.lundin@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35272}
diff --git a/rtc_base/swap_queue_unittest.cc b/rtc_base/swap_queue_unittest.cc
index 3862d85..764a25e 100644
--- a/rtc_base/swap_queue_unittest.cc
+++ b/rtc_base/swap_queue_unittest.cc
@@ -144,8 +144,7 @@
   int invalid_value = -4;
   EXPECT_TRUE(queue.Insert(&valid_value));
   EXPECT_TRUE(queue.Remove(&valid_value));
-  bool result;
-  EXPECT_DEATH(result = queue.Insert(&invalid_value), "");
+  EXPECT_DEATH((void)queue.Insert(&invalid_value), "");
 }
 
 TEST(SwapQueueDeathTest, UnSuccessfulItemVerifyInsert) {
@@ -154,8 +153,7 @@
             SwapQueueItemVerifier<std::vector<int>, &LengthVerifierFunction>>
       queue(2, template_element);
   std::vector<int> invalid_chunk(kChunkSize - 1, 0);
-  bool result;
-  EXPECT_DEATH(result = queue.Insert(&invalid_chunk), "");
+  EXPECT_DEATH((void)queue.Insert(&invalid_chunk), "");
 }
 
 TEST(SwapQueueDeathTest, UnSuccessfulItemVerifyRemove) {
@@ -167,8 +165,7 @@
   std::vector<int> valid_chunk(kChunkSize, 0);
   EXPECT_TRUE(queue.Insert(&valid_chunk));
   EXPECT_EQ(valid_chunk.size(), kChunkSize);
-  bool result;
-  EXPECT_DEATH(result = queue.Remove(&invalid_chunk), "");
+  EXPECT_DEATH((void)queue.Remove(&invalid_chunk), "");
 }
 #endif