DisplayDecoration VTS: remove expected changed composition types

If validateDisplay returns an error, changed composition types are not
propagated back to the caller. Remove the expectation that they will be.

Fixes: 221406264
Test: this
Change-Id: I3e07e40b0c12a2cf6eaa685435647aab93172bb0
diff --git a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
index 68ec7e8..bfb6b85 100644
--- a/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
+++ b/graphics/composer/aidl/vts/VtsHalGraphicsComposer3_TargetTest.cpp
@@ -1656,11 +1656,6 @@
             const auto errors = mReader.takeErrors();
             ASSERT_EQ(1, errors.size());
             EXPECT_EQ(IComposerClient::EX_UNSUPPORTED, errors[0].errorCode);
-
-            const auto changedTypes = mReader.takeChangedCompositionTypes(display.getDisplayId());
-            ASSERT_EQ(1u, changedTypes.size());
-            const auto changedType = changedTypes[0].composition;
-            EXPECT_TRUE(changedType == Composition::DEVICE || changedType == Composition::CLIENT);
         }
     }
 }