Remove unnecessary check -- variables should always be available in the stack.
Remove unnecessary check -- variables should always be available in the stack.

jbeda/jsonnet,sparkprime/jsonnet,jbeda/jsonnet,huggsboson/jsonnet,davidzchen/jsonnet,lamuguo/jsonnet,Neeke/jsonnet,google/jsonnet,sparkprime/jsonnet,huggsboson/jsonnet,google/jsonnet,lamuguo/jsonnet,Neeke/jsonnet,jbeda/jsonnet,google/jsonnet,huggsboson/jsonnet,Neeke/jsonnet,lamuguo/jsonnet,google/jsonnet,google/jsonnet,google/jsonnet,Neeke/jsonnet,davidzchen/jsonnet,jbeda/jsonnet,jbeda/jsonnet,huggsboson/jsonnet,sparkprime/jsonnet,Neeke/jsonnet,sparkprime/jsonnet,davidzchen/jsonnet,sparkprime/jsonnet,lamuguo/jsonnet,lamuguo/jsonnet,sparkprime/jsonnet,huggsboson/jsonnet,davidzchen/jsonnet,davidzchen/jsonnet