Remove unused local variables.

Test: normal build.
Change-Id: I328f4d722df4b8d14d84c12229d5bb037f3a43ed
diff --git a/guest/frontend/vnc_server/vnc_client_connection.cpp b/guest/frontend/vnc_server/vnc_client_connection.cpp
index 7336d00..6122017 100644
--- a/guest/frontend/vnc_server/vnc_client_connection.cpp
+++ b/guest/frontend/vnc_server/vnc_client_connection.cpp
@@ -373,7 +373,6 @@
 
 void VncClientConnection::FrameBufferUpdateRequestHandler(bool aggressive) {
   BlackBoard::Registerer reg(bb_, this);
-  const StripeSeqNumber kBeginningOfTime{};
 
   while (!closed()) {
     auto stripes = bb_->WaitForSenderWork(this);
diff --git a/host/frontend/vnc_server/vnc_client_connection.cpp b/host/frontend/vnc_server/vnc_client_connection.cpp
index 62cb90a..e38a336 100644
--- a/host/frontend/vnc_server/vnc_client_connection.cpp
+++ b/host/frontend/vnc_server/vnc_client_connection.cpp
@@ -386,7 +386,6 @@
 
 void VncClientConnection::FrameBufferUpdateRequestHandler(bool aggressive) {
   BlackBoard::Registerer reg(bb_, this);
-  const StripeSeqNumber kBeginningOfTime{};
 
   while (!closed()) {
     auto stripes = bb_->WaitForSenderWork(this);