Vulkan: Lift failing test suppression.

EGLContextSharingTest.DeleteReaderOfSharedTexture/ES2_Vulkan

Passes with the new command graph linearization.

Bug: angleproject:4130
Change-Id: Ic7233696d2c06303ddf46947610b793a1a9e8a65
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2063041
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>

src/tests/egl_tests/EGLContextSharingTest.cpp

@@ -376,9 +376,6 @@ TEST_P(EGLContextSharingTest, DeleteReaderOfSharedTexture)
 {
     ANGLE_SKIP_TEST_IF(!platformSupportsMultithreading());
 
-    // Bug in the Vulkan backend. http://anglebug.com/4130
-    ANGLE_SKIP_TEST_IF(IsVulkan());
-
     // Initialize contexts
     EGLWindow *window = getEGLWindow();
     EGLDisplay dpy    = window->getDisplay();