Dead code in MatrixHandler

[f0x52]

matrix-appservice-irc/src/bridge/MatrixHandler.ts

Lines 1116 to 1120 in 062f3ac

	let body = cacheBody.trim().substring(0, this.config.replySourceMaxLength);
	const nextNewLine = body.indexOf("\n");
	if (nextNewLine !== -1) {
	body = body.substring(0, nextNewLine);
	}

A truncated version of the cacheBody is stored in the variable body here, which is never used afterwards.
Wasn't caught by eslint / editor greying it out because of #L1117, but it's essentially not accomplishing anything.
It's unclear to me if this part should just be removed, or if it is desired to strip the cacheBody before storing it in the eventCache. If the latter is true, this should probably use trimString() instead, like is done here