[vm] Remove usages of --enable-inlining-annotations

They have no effect since [0] landed.

[0] https://dart-review.googlesource.com/c/sdk/+/99148

TEST=Changes test to remove flag that doesn't have effect.

Change-Id: I31164eb7cc99b197b27cfe3c96e5542ab66ed6c5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/187861
Reviewed-by: Clement Skau <cskau@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
diff --git a/tests/ffi/structs_test.dart b/tests/ffi/structs_test.dart
index 77026a4..18448c0 100644
--- a/tests/ffi/structs_test.dart
+++ b/tests/ffi/structs_test.dart
@@ -4,7 +4,7 @@
 //
 // Dart test program for testing dart:ffi struct pointers.
 //
-// VMOptions=--deterministic --optimization-counter-threshold=50 --enable-inlining-annotations
+// VMOptions=--deterministic --optimization-counter-threshold=50
 
 import 'dart:ffi';
 
diff --git a/tests/ffi_2/structs_test.dart b/tests/ffi_2/structs_test.dart
index 77026a4..18448c0 100644
--- a/tests/ffi_2/structs_test.dart
+++ b/tests/ffi_2/structs_test.dart
@@ -4,7 +4,7 @@
 //
 // Dart test program for testing dart:ffi struct pointers.
 //
-// VMOptions=--deterministic --optimization-counter-threshold=50 --enable-inlining-annotations
+// VMOptions=--deterministic --optimization-counter-threshold=50
 
 import 'dart:ffi';