docs: Remove old redundant text (#8893)

The quote marks were already removed in db2d07f236

documentation/tutorial/05-events/02-inline-handlers/text.md

@@ -10,6 +10,4 @@ You can also declare event handlers inline:
 </div>
 ```
 
-The quote marks are optional, but they're helpful for syntax highlighting in some environments.
-
 > In some frameworks you may see recommendations to avoid inline event handlers for performance reasons, particularly inside loops. That advice doesn't apply to Svelte — the compiler will always do the right thing, whichever form you choose.