[modules] Allow import.meta callback to throw

It makes no sense to allow calling into V8 but at the same time insist
that there must be no exception, as potentially any such call can result
in a stack overflow.

This CL only removes a comment from v8.h, the code changes were part of
https://chromium-review.googlesource.com/c/v8/v8/+/2299375.

Bug: v8:7044
Change-Id: I57769fa0f109219d07a7bdb979b46ca98cd0cec7
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2306792
Auto-Submit: Georg Neis <neis@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68999}

include/v8.h

@@ -7240,8 +7240,7 @@ typedef MaybeLocal<Promise> (*HostImportModuleDynamicallyCallback)(
 
 /**
  * HostInitializeImportMetaObjectCallback is called the first time import.meta
- * is accessed for a module. Subsequent access will reuse the same value. The
- * callback must not throw.
+ * is accessed for a module. Subsequent access will reuse the same value.
  *
  * The method combines two implementation-defined abstract operations into one:
  * HostGetImportMetaProperties and HostFinalizeImportMeta.