Remove unused header import (#51754)

Summary:
Pull Request resolved: #51754

Changelog: [Internal]

Remove unused header import from RuntimeScheduler_Modern.cpp

Reviewed By: mdvacca

Differential Revision: D75815960

fbshipit-source-id: 32f7cab30216b3a76452dc9ef6354517fe3fcaf2

Author: realsoelynn

packages/react-native/ReactCommon/react/renderer/runtimescheduler/RuntimeScheduler_Modern.cpp

@@ -6,7 +6,6 @@
  */
 
 #include "RuntimeScheduler_Modern.h"
-#include "SchedulerPriorityUtils.h"
 
 #include <ReactCommon/RuntimeExecutorSyncUIThreadUtils.h>
 #include <cxxreact/TraceSection.h>
@@ -15,7 +14,6 @@
 #include <react/renderer/consistency/ScopedShadowTreeRevisionLock.h>
 #include <react/timing/primitives.h>
 #include <react/utils/OnScopeExit.h>
-#include <utility>
 
 namespace facebook::react {