diff --git a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
index c87123c72d..014547cf2d 100644
--- a/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
+++ b/packages/svelte/src/compiler/phases/3-transform/client/visitors/shared/utils.js
@@ -10,6 +10,10 @@ import is_reference from 'is-reference';
 import { dev, is_ignored, locator, component_name } from '../../../../../state.js';
 import { build_getter } from '../../utils.js';
 
+/**
+ * A utility for extracting complex expressions (such as call expressions)
+ * from templates and replacing them with `$0`, `$1` etc
+ */
 export class Memoizer {
 	/** @type {Array<{ id: Identifier, expression: Expression }>} */
 	#sync = [];
diff --git a/packages/svelte/src/compiler/validate-options.js b/packages/svelte/src/compiler/validate-options.js
index 0e24f5110a..ed83375d22 100644
--- a/packages/svelte/src/compiler/validate-options.js
+++ b/packages/svelte/src/compiler/validate-options.js
@@ -245,19 +245,6 @@ function validator(fallback, fn) {
 	};
 }
 
-/**
- * @param {number} fallback
- * @returns {Validator}
- */
-function number(fallback) {
-	return validator(fallback, (input, keypath) => {
-		if (typeof input !== 'number') {
-			throw_error(`${keypath} should be a number, if specified`);
-		}
-		return input;
-	});
-}
-
 /**
  * @param {string | undefined} fallback
  * @param {boolean} allow_empty
@@ -277,20 +264,6 @@ function string(fallback, allow_empty = true) {
 	});
 }
 
-/**
- * @param {string[]} fallback
- * @returns {Validator}
- */
-function string_array(fallback) {
-	return validator(fallback, (input, keypath) => {
-		if (input && !Array.isArray(input)) {
-			throw_error(`${keypath} should be a string array, if specified`);
-		}
-
-		return input;
-	});
-}
-
 /**
  * @param {boolean | undefined} fallback
  * @returns {Validator}