Remove reference to Python 2 in README.md (#1321)

Author: pdelboca

README.md

@@ -74,7 +74,7 @@ Note there is an old broken package called `htmx`.  This is `htmx.org`.
 
 To develop htmx locally, you will need to install the development dependencies.
 
-__Requires Python 2 and Node 15.__
+__Requires Python and Node 15.__
 
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