remove no selection option

app/client/src/components/propertyControls/DropDownControl.tsx

@@ -6,7 +6,7 @@ import { DropdownOption } from "components/ads/Dropdown";
 class DropDownControl extends BaseControl<DropDownControlProps> {
   render() {
     let defaultSelected: DropdownOption = {
-      label: "No results.",
+      label: "No selection.",
       value: undefined,
     };
     if (this.props.defaultValue) {

app/client/src/widgets/TableWidget/TablePropertyPaneConfig.ts

@@ -223,10 +223,6 @@ export default [
                   label: "Original Date Format",
                   controlType: "DROP_DOWN",
                   options: [
-                    {
-                      label: "No Selection",
-                      value: "",
-                    },
                     {
                       label: "UNIX timestamp (s)",
                       value: "Epoch",
@@ -331,10 +327,6 @@ export default [
                   customJSControl: "COMPUTE_VALUE",
                   isJSConvertible: true,
                   options: [
-                    {
-                      label: "No Selection",
-                      value: "",
-                    },
                     {
                       label: "UNIX timestamp (s)",
                       value: "Epoch",