Remove unused $valueList parameter from Stylesheet
Remove unused $valueList parameter from Stylesheet

Remove unused `$valueList` paramenter from
`Concrete\Core\StyleCustomizer\Stylesheet`

`$valueList` appears to have become a class property now as opposed to
being passed in as a parameter. The parameter does not appear to be used
in the method and a scan for other `getCSS()` calls shows them as also
not using the parameter.


Former-commit-id: f7064633b90f0331d280388b8a6ac086b510e6de
MrKarlDilkington/concrete5,concrete5/concrete5,mainio/concrete5,haeflimi/concrete5,haeflimi/concrete5,haeflimi/concrete5,acliss19xx/concrete5,hissy/concrete5,jaromirdalecky/concrete5,concrete5/concrete5,KorvinSzanto/concrete5,a3020/concrete5,jaromirdalecky/concrete5,hissy/concrete5,haeflimi/concrete5,jaromirdalecky/concrete5,triplei/concrete5-8,triplei/concrete5-8,olsgreen/concrete5,deek87/concrete5,MrKarlDilkington/concrete5,MrKarlDilkington/concrete5,biplobice/concrete5,deek87/concrete5,rikzuiderlicht/concrete5,rikzuiderlicht/concrete5,rikzuiderlicht/concrete5,deek87/concrete5,biplobice/concrete5,deek87/concrete5,acliss19xx/concrete5,biplobice/concrete5,biplobice/concrete5,acliss19xx/concrete5,KorvinSzanto/concrete5,triplei/concrete5-8,mlocati/concrete5,mlocati/concrete5,concrete5/concrete5,mainio/concrete5,hissy/concrete5,hissy/concrete5,jaromirdalecky/concrete5,olsgreen/concrete5,mlocati/concrete5,a3020/concrete5,mainio/concrete5,KorvinSzanto/concrete5,olsgreen/concrete5,mlocati/concrete5,concrete5/concrete5