Update README.md to remove warnings

Missed this on earlier merge and release. Oops.

README.md

@@ -1,17 +1,3 @@
-# WARNING: This is an experimental version that includes StxTyper
-
-Currently it will need to be compiled from source to install.
-
-### Downloading and compiling AMRFinderPlus with StxTyper
-
-    git clone https://github.com/ncbi/amr.git
-    cd amr
-    git checkout stxtype
-    git submodule update --init
-    make
-    ./amrfinder -u
-    make test
-
 # NCBI Antimicrobial Resistance Gene Finder (AMRFinderPlus)
 
 This software and the accompanying database are designed to find acquired antimicrobial resistance genes and point mutations in protein and/or assembled nucleotide sequences. We have also added "plus" stress, heat, and biocide resistance and virulence factors for [some organisms](https://github.com/evolarjun/amr/wiki/Curated-organisms).