Fix lint (#1652)

two NOs make a YES 😄

Author: abhijeethp

packages/database/src/core/view/QueryParams.ts

@@ -264,7 +264,7 @@ export class QueryParams {
   startAt(indexValue: any, key?: string | null): QueryParams {
     const newParams = this.copy_();
     newParams.startSet_ = true;
-    if (!(indexValue !== undefined)) {
+    if (indexValue === undefined) {
       indexValue = null;
     }
     newParams.indexStartValue_ = indexValue;
@@ -286,7 +286,7 @@ export class QueryParams {
   endAt(indexValue: any, key?: string | null): QueryParams {
     const newParams = this.copy_();
     newParams.endSet_ = true;
-    if (!(indexValue !== undefined)) {
+    if (indexValue === undefined) {
       indexValue = null;
     }
     newParams.indexEndValue_ = indexValue;