chore: fix non-relative import (#12419)

packages/svelte/src/legacy/legacy-client.js

@@ -1,9 +1,9 @@
 /** @import { ComponentConstructorOptions, ComponentType, SvelteComponent, Component } from 'svelte' */
-import { mutable_source, get, set } from 'svelte/internal/client';
+import { mutable_source, set } from '../internal/client/reactivity/sources.js';
 import { user_pre_effect } from '../internal/client/reactivity/effects.js';
 import { hydrate, mount, unmount } from '../internal/client/render.js';
+import { get } from '../internal/client/runtime.js';
 import { define_property } from '../internal/client/utils.js';
-import { safe_not_equal } from '../internal/client/reactivity/equality.js';
 
 /**
  * Takes the same options as a Svelte 4 component and the component function and returns a Svelte 4 compatible component.