qemu: the old command string is redundant now

git-svn-id: https://svn.apache.org/repos/asf/incubator/tashi/trunk@1370060 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/tashi/nodemanager/vmcontrol/qemu.py b/src/tashi/nodemanager/vmcontrol/qemu.py
index 5c30f34..06ee0ee 100644
--- a/src/tashi/nodemanager/vmcontrol/qemu.py
+++ b/src/tashi/nodemanager/vmcontrol/qemu.py
@@ -405,7 +405,6 @@
 		host = Host()
 		host.id = service.id
 		host.name = socket.gethostname()
-		cmd = "head -n 1 /proc/meminfo"
 
 		# Linux specific
 		memoryStr = open("/proc/meminfo","r").readline().strip().split()