Remove unused cutils/sched_policy.h include

Bug: 36426473
Bug: 36079834
Test: m -j libhwbinder
Change-Id: I3560f17bae126abde0a66505ea9a1287ab47e06a
diff --git a/IPCThreadState.cpp b/IPCThreadState.cpp
index 83e2dd8..c3ce7d3 100644
--- a/IPCThreadState.cpp
+++ b/IPCThreadState.cpp
@@ -23,7 +23,6 @@
 #include <hwbinder/TextOutput.h>
 #include <hwbinder/binder_kernel.h>
 
-#include <cutils/sched_policy.h>
 #include <utils/Log.h>
 #include <utils/SystemClock.h>
 #include <utils/threads.h>