init.common.usb.rc: remove duplicate trigger

the same trigger of "on property:init.svc.adbd=stopped"
is defined in the file of system/core/rootdir/init.usb.configfs.rc here:
https://android.googlesource.com/platform/system/core/+/master/rootdir/init.usb.configfs.rc#15

Test: manually with hikey

Change-Id: I05348ceab39a7090135d59e54df77a818149b88e
Signed-off-by: Yongqin Liu <yongqin.liu@linaro.org>
1 file changed