Remove obsolete KERNEL_WAKE_SOURCES from bugreport

This is covered by dumpsys suspend_control_internal.
/d/wakeup-sources is no longer present.

Test: atest dumpstate_smoke_test
Bug: 190337283
Change-Id: Iebace0f02875a00b0221983fe8391bb8a85ef609
diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index 8ccd940..1003aae 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -1582,7 +1582,6 @@
     DumpFile("BUDDYINFO", "/proc/buddyinfo");
     DumpExternalFragmentationInfo();
 
-    DumpFile("KERNEL WAKE SOURCES", "/d/wakeup_sources");
     DumpFile("KERNEL CPUFREQ", "/sys/devices/system/cpu/cpu0/cpufreq/stats/time_in_state");
 
     RunCommand("PROCESSES AND THREADS",