remove testing grids

Author: pharret31

apps/demos/tsconfig.react-check.json

@@ -35,8 +35,6 @@
     "Demos/Sortable/**/React/**/*.tsx",
     "Demos/TreeList/**/React/**/*.ts",
     "Demos/TreeList/**/React/**/*.tsx",
-    "Demos/DataGrid/**/React/**/*.ts",
-    "Demos/DataGrid/**/React/**/*.tsx",
     "Demos/Accordion/**/React/**/*.ts",
     "Demos/Accordion/**/React/**/*.tsx",
     "Demos/ActionSheet/**/React/**/*.ts",