Remove flag view_set_requested_frame_rate_mrr

Already soaked in staging and the flag is incorrectly not marked with
metadata bugfix.

Bug: 352206100
Test: atest libsurfaceflinger_unittest
Flag: EXEMPT_bugfix

Change-Id: Icb79bcddedb115ce6b65d7ef7deb3c31bddfda21
diff --git a/services/surfaceflinger/Scheduler/LayerInfo.cpp b/services/surfaceflinger/Scheduler/LayerInfo.cpp
index dbc458c..ff1926e 100644
--- a/services/surfaceflinger/Scheduler/LayerInfo.cpp
+++ b/services/surfaceflinger/Scheduler/LayerInfo.cpp
@@ -595,8 +595,7 @@
         return true;
     }
 
-    if (FlagManager::getInstance().view_set_requested_frame_rate_mrr() &&
-        category == FrameRateCategory::NoPreference && vote.rate.isValid() &&
+    if (category == FrameRateCategory::NoPreference && vote.rate.isValid() &&
         vote.type == FrameRateCompatibility::ExactOrMultiple) {
         return true;
     }