refactor: clean up unnecessary comments and whitespace

Author: caiquetorres

packages/svelte/src/compiler/phases/1-parse/read/context.js

@@ -120,7 +120,6 @@ function read_expression_length(parser, start) {
  * @param {Parser} parser
  * @param {number} start
  * @param {number} quote
- * @returns {number}
  */
 function read_string_length(parser, start, quote) {
 	let i = start;

packages/svelte/src/compiler/phases/1-parse/utils/quote.js

@@ -7,7 +7,6 @@ export function is_quote(code) {
 	return code === SINGLE_QUOTE || code === DOUBLE_QUOTE || code === BACK_QUOTE;
 }
 
-
 /** @param {number} code */
 export function is_back_quote(code) {
 	return code === BACK_QUOTE;