Fix comment that says "control case" when it isn't.

Bug:
Change-Id: I414bdabeeb12ed53c0620ead80d54a1448bb95bb
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/35720
Auto-Submit: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Austin Eng <enga@chromium.org>
Reviewed-by: Austin Eng <enga@chromium.org>
diff --git a/src/tests/unittests/validation/UnsafeAPIValidationTests.cpp b/src/tests/unittests/validation/UnsafeAPIValidationTests.cpp
index c6822ed..87b2602 100644
--- a/src/tests/unittests/validation/UnsafeAPIValidationTests.cpp
+++ b/src/tests/unittests/validation/UnsafeAPIValidationTests.cpp
@@ -168,14 +168,14 @@
         device.CreateBindGroupLayout(&desc);
     }
 
-    // Control case: storage buffer with a dynamic offset is disallowed.
+    // Storage buffer with a dynamic offset is disallowed.
     {
         entry.type = wgpu::BindingType::StorageBuffer;
         entry.hasDynamicOffset = true;
         ASSERT_DEVICE_ERROR(device.CreateBindGroupLayout(&desc));
     }
 
-    // Control case: readonly storage buffer with a dynamic offset is disallowed.
+    // Readonly storage buffer with a dynamic offset is disallowed.
     {
         entry.type = wgpu::BindingType::ReadonlyStorageBuffer;
         entry.hasDynamicOffset = true;