cable: drop unused assignment

Drop unused reply.value assignment.

Change-Id: I58d3bac0a9e2132a1f2fe82427d195dce3811c16
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/cable.cpp b/cable.cpp
index a9e6da2..ea362b2 100644
--- a/cable.cpp
+++ b/cable.cpp
@@ -126,7 +126,6 @@
 
     struct CableReply reply;
     reply.subcommand = SysCableCheck;
-    reply.value = 0x00; // Default false
 
     // If we have received packets then there is a cable present.
     reply.value = (count > 0) ? 1 : 0;