Updated Quick start v7 (markdown)

Quick-start.md

@@ -1,6 +1,3 @@
-# Warning: this is a preview of the future v7 version
-Please check [this quick start](https://github.com/f4exb/sdrangel/wiki/Quick-start) for instructions on the present version
-
 <h2>Brief introduction</h2>
 
 SDRangel uses [sample source plugins](/f4exb/sdrangel/wiki/Sample-source-plugins) to collect I/Q samples from a hardware device. Then in the passband returned possibly decimated one or more [channel Rx plugins](/f4exb/sdrangel/wiki/Channel-Rx-plugins) can be used to demodulate, decode or analyze some part of this spectrum.