chromeos: Remove AshTestBase::SupportsMultipleDisplays

ash/magnifier/partial_magnification_controller_unittest.cc

Index: ash/magnifier/partial_magnification_controller_unittest.cc
diff --git a/ash/magnifier/partial_magnification_controller_unittest.cc b/ash/magnifier/partial_magnification_controller_unittest.cc
index f0f571e51c9574e5af982ecd4f25f19b20b6cbcc..1c8e4b5bce078ca6ad203726ed7064d670235a47 100644
--- a/ash/magnifier/partial_magnification_controller_unittest.cc
+++ b/ash/magnifier/partial_magnification_controller_unittest.cc
@@ -89,8 +89,6 @@ TEST_F(PartialMagnificationControllerTest, ActiveOnPointerDown) {
 // Verifies that nothing bad happens if a second display is disconnected while
 // the magnifier is active.
 TEST_F(PartialMagnificationControllerTest, MultipleDisplays) {
-  if (!SupportsMultipleDisplays())
-    return;
   GetEventGenerator().EnterPenPointerMode();
 
   // Active magnifier with two displays, move it to the second display.