Remove top and bottom rules from tables in style_green.tex

style_green.tex

@@ -60,7 +60,7 @@ $endif$
 \setupfloat[figure][default={here,nonumber}]
 \setupfloat[table][default={here,nonumber}]
 
-\setuptables[textwidth=max]
+\setuptables[textwidth=max, HL=none]
 
 \setupthinrules[width=15em] % width of horizontal rules