doc: remove rt gsg kernel info
No need rt kernel info in gsg doc.
@@ -9,7 +9,6 @@ Verified version
- Clear Linux version: **31670**
- ACRN-hypervisor tag: **v1.4**
- ACRN-Kernel(Service VM kernel): **4.19.78-98.iot-lts2018-sos**
-- ACRN-Kernel(Preempt-RT kernel): **acrn-2019w47.3-140000p**
Prerequisites
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