dbus-sdr/storagecommands: Fix type

Return type of writeFruCache is unused, set it to void.

Change-Id: I3d60867c9366ff22dc0a39085ff000f45ddebf2f
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/dbus-sdr/storagecommands.cpp b/dbus-sdr/storagecommands.cpp
index eeed777..17ed9ff 100644
--- a/dbus-sdr/storagecommands.cpp
+++ b/dbus-sdr/storagecommands.cpp
@@ -157,9 +157,9 @@
     return true;
 }
 
-bool writeFruCache()
+void writeFruCache()
 {
-    return writeFru(fruCache);
+    writeFru(fruCache);
 }
 
 void createTimers()