sm7250-common: init: Don't mount TraceFS twice.

* AOSP already mounts TraceFS in system init, so mounting it twice
   causes SEPolicy denials. See the comments in this change.

   https://android-review.googlesource.com/c/platform/system/sepolicy/+/1294195

Change-Id: Ic5d9ac2dbd36e404a93a8d48aa0ea933fd7fa701

rootdir/etc/init.qcom.rc

@@ -39,8 +39,6 @@ import /vendor/etc/init/hw/init.qcom.test.rc
 on early-init
     mount debugfs debugfs /sys/kernel/debug
     chmod 0755 /sys/kernel/debug
-    mount tracefs tracefs /sys/kernel/tracing
-    chmod 0755 /sys/kernel/tracing
 
   # create symlink for vendor mount points
     symlink /vendor/firmware_mnt /firmware