IDL: Drop [inline_doc] from Web IDL file

A Web IDL file idb_transaction_options.idl contains an invalid
extended attribute [inline_doc].
This CL removes the attribute, and have no behavior change.


Bug: 999690
Change-Id: Ia297d5ddf568a617640d363d1f1dda857e11b814
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1792215Reviewed-by: enne <enne@chromium.org>
Reviewed-by: Joshua Bell <jsbell@chromium.org>
Commit-Queue: enne <enne@chromium.org>
Auto-Submit: Hitoshi Yoshida <peria@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694811}

third_party/blink/renderer/modules/indexeddb/idb_transaction_options.idl

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-[inline_doc] dictionary IDBTransactionOptions {
+dictionary IDBTransactionOptions {
     // If relaxedDurability is true, then the transaction will not be flushed
     // to disk.  This is more performant at the cost of durability.
     boolean relaxedDurability = false;