Remove duplicate call to randomof and setting characters

Remove debug
ref #469

lib/captcha/generators/grid2.js

@@ -58,10 +58,8 @@ module.exports = async () => {
 		const isCorrect = await randomBool(127);
 		if (col < correctCol) {
 			arrows = isCorrect ? eArrows : [...sArrows, ...nArrows, ...wArrows];
-			charMatrix[correctRow][col] = await randomOf(arrows);
 		} else if (col > correctCol) {
 			arrows = isCorrect ? wArrows : [...sArrows, ...nArrows, ...eArrows];
-			charMatrix[correctRow][col] = await randomOf(arrows);
 		}
 		charMatrix[correctRow][col] = await randomOf(arrows);
 		answerMatrix[correctRow][col] = isCorrect;
@@ -112,8 +110,6 @@ module.exports = async () => {
 		}
 	}
 
-//console.log(charMatrix, answerMatrix);
-
 	//insert the captcha to db and get id
 	const captchaId = await Captchas.insertOne(answerMatrix.flat()).then(r => r.insertedId);