Revert "SF: Introduce struct surfaceflinger::Config"

Revert submission 23423266-SF-Config

Reason for revert: UIBench Jank Regression reported in b/288665387

Reverted changes: /q/submissionid:23423266-SF-Config

Change-Id: I0942f99fec1f211e607e3ff44da2dfa0e30d34c2
diff --git a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
index 7124f87..e32cf88 100644
--- a/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
+++ b/services/surfaceflinger/tests/unittests/DisplayTransactionTest.cpp
@@ -34,7 +34,7 @@
             ::testing::UnitTest::GetInstance()->current_test_info();
     ALOGD("**** Setting up for %s.%s\n", test_info->test_case_name(), test_info->name());
 
-    mFlinger.mutableConfig().supportsWideColor = false;
+    mFlinger.mutableSupportsWideColor() = false;
     mFlinger.mutableDisplayColorSetting() = DisplayColorSetting::kUnmanaged;
 
     mFlinger.setCreateBufferQueueFunction([](auto, auto, auto) {