Fix -Wunused-variable compiler warning

Test: presubmit
Change-Id: I146d3435fe76da7f300452a14b62ce430c38ae36
diff --git a/audio/aidl/default/Stream.cpp b/audio/aidl/default/Stream.cpp
index e8c1693..a805b87 100644
--- a/audio/aidl/default/Stream.cpp
+++ b/audio/aidl/default/Stream.cpp
@@ -582,7 +582,7 @@
     const size_t frameSize = mContext->getFrameSize();
     bool fatal = false;
     int32_t latency = mContext->getNominalLatencyMs();
-    if (bool success = readByteCount > 0 ? dataMQ->read(&mDataBuffer[0], readByteCount) : true) {
+    if (readByteCount > 0 ? dataMQ->read(&mDataBuffer[0], readByteCount) : true) {
         const bool isConnected = mIsConnected;
         LOG(VERBOSE) << __func__ << ": reading of " << readByteCount << " bytes from data MQ"
                      << " succeeded; connected? " << isConnected;
diff --git a/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp b/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp
index aad07de..fe749f6 100644
--- a/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp
+++ b/automotive/can/1.0/default/libnetdevice/libnetdevice.cpp
@@ -102,7 +102,7 @@
 
 static bool hasIpv4(std::string ifname) {
     auto ifr = ifreqs::fromName(ifname);
-    switch (const auto status = ifreqs::trySend(SIOCGIFADDR, ifr)) {
+    switch (ifreqs::trySend(SIOCGIFADDR, ifr)) {
         case 0:
             return true;
         case EADDRNOTAVAIL: