Remove Foreground Boost CPUSet

This functionality was removed at
https://android.googlesource.com/platform/frameworks/base/+/a712d4058f6f85268838
diff --git a/init.common.rc b/init.common.rc
index 41fd8d3..a5629a4 100644
--- a/init.common.rc
+++ b/init.common.rc
@@ -14,7 +14,6 @@
 
     # Initialize cpusets to boot-time values
     write /dev/cpuset/foreground/cpus 0-7
-    write /dev/cpuset/foreground/boost/cpus 0-7
     write /dev/cpuset/background/cpus 0-7
     write /dev/cpuset/system-background/cpus 0-7
     write /dev/cpuset/top-app/cpus 0-7