fix #6362: qm: remove duplicate 'only'

Signed-off-by: Fabian Grünbichler <[email protected]>

Author: Fabian-Gruenbichler

qm.adoc

@@ -675,8 +675,8 @@ In {pve} the maximal number of plugged CPUs is always `cores * sockets`.
 To start a VM with less than this total core count of CPUs you may use the
 *vcpus* setting, it denotes how many vCPUs should be plugged in at VM start.
 
-Currently only this feature is only supported on Linux, a kernel newer than 3.10
-is needed, a kernel newer than 4.7 is recommended.
+Currently this feature is only supported on Linux, a kernel newer than 3.10 is
+needed, a kernel newer than 4.7 is recommended.
 
 You can use a udev rule as follow to automatically set new CPUs as online in
 the guest: