d3d11: remove the workaround in DeviceOutlivesInstance

Bug: dawn:1705
Change-Id: Ic10965ee246b197f72f2be063b6bf70122c5a4ed
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/130700
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>

src/dawn/tests/end2end/DeviceInitializationTests.cpp

@@ -83,10 +83,7 @@ TEST_F(DeviceInitializationTest, DeviceOutlivesInstance) {
             if (properties.backendType == wgpu::BackendType::Null) {
                 continue;
             }
-            // TODO(dawn:1705): Remove this once D3D11 backend is fully implemented.
-            if (properties.backendType == wgpu::BackendType::D3D11) {
-                continue;
-            }
+
             availableAdapterProperties.push_back(properties);
         }
     }