Modify csv module's documentation to reflect top-level await support

docs/sources/k6/next/javascript-api/k6-experimental/csv/Options.md

@@ -25,17 +25,13 @@ The `Options` object describes the configuration available for the operation of
 import { open } from 'k6/experimental/fs';
 import csv from 'k6/experimental/csv';
 
-let file;
-let parser;
-(async function () {
-  file = await open('data.csv');
-  parser = new csv.Parser(file, {
-    delimiter: ',',
-    skipFirstLine: true,
-    fromLine: 2,
-    toLine: 8,
-  });
-})();
+const file = await open('data.csv');
+const parser = new csv.Parser(file, {
+  delimiter: ',',
+  skipFirstLine: true,
+  fromLine: 2,
+  toLine: 8,
+});
 
 export default async function () {
   // The `next` method attempts to read the next row from the CSV file.

docs/sources/k6/next/javascript-api/k6-experimental/csv/Parser.md

@@ -64,12 +64,8 @@ export const options = {
   iterations: 10,
 };
 
-let file;
-let parser;
-(async function () {
-  file = await open('data.csv');
-  parser = new csv.Parser(file, { skipFirstLine: true });
-})();
+const file = await open('data.csv');
+const parser = new csv.Parser(file, { skipFirstLine: true });
 
 export default async function () {
   // The `next` method attempts to read the next row from the CSV file.

docs/sources/k6/next/javascript-api/k6-experimental/csv/_index.md

@@ -52,15 +52,11 @@ export const options = {
   iterations: 10,
 };
 
-let file;
-let csvRecords;
-(async function () {
-  file = await open('data.csv');
+const file = await open('data.csv');
 
-  // The `csv.parse` function consumes the entire file at once and returns
-  // the parsed records as a `SharedArray` object.
-  csvRecords = await csv.parse(file, { delimiter: ',' });
-})();
+// The `csv.parse` function consumes the entire file at once and returns
+// the parsed records as a `SharedArray` object.
+const csvRecords = await csv.parse(file, { delimiter: ',' });
 
 export default async function () {
   // `csvRecords` is a `SharedArray`. Each element is a record from the CSV file, represented as an array
@@ -85,12 +81,11 @@ export const options = {
   iterations: 10,
 };
 
-let file;
-let parser;
-(async function () {
-  file = await open('data.csv');
-  parser = new csv.Parser(file);
-})();
+const file = await open('data.csv');
+
+// The `csv.parse` function consumes the entire file at once and returns
+// the parsed records as a `SharedArray` object.
+const parser = new csv.Parser(file);
 
 export default async function () {
   // The parser `next` method attempts to read the next row from the CSV file.

docs/sources/k6/next/javascript-api/k6-experimental/csv/parse.md

@@ -55,15 +55,11 @@ export const options = {
   iterations: 10,
 };
 
-let file;
-let csvRecords;
-(async function () {
-  file = await open('data.csv');
+const file = await open('data.csv');
 
-  // The `csv.parse` function consumes the entire file at once and returns
-  // the parsed records as a `SharedArray` object.
-  csvRecords = await csv.parse(file, { skipFirstLine: true });
-})();
+// The `csv.parse` function consumes the entire file at once and returns
+// the parsed records as a `SharedArray` object.
+const csvRecords = await csv.parse(file, { skipFirstLine: true });
 
 export default async function () {
   // `csvRecords` is a `SharedArray`. Each element is a record from the CSV file, represented as an array