Revert "Start netd before running tests on Buildbot devices."

This partially reverts commit 30d26960774aaa2c5ea647f0a90a562365efab03.

Reason for revert: No longer needed, as the ART Buildbot no longer
uses devices running Android Oreo.

Test: art/tools/run-libcore-tests.sh --mode=device
Test: art/tools/run-jdwp-tests.sh --mode=device
Bug: 74725685
Change-Id: I0df259b07f68601353330da9c4f52b91cad328fd
diff --git a/tools/setup-buildbot-device.sh b/tools/setup-buildbot-device.sh
index 1359092..8883ed5 100755
--- a/tools/setup-buildbot-device.sh
+++ b/tools/setup-buildbot-device.sh
@@ -65,21 +65,6 @@
 adb shell ifconfig lo up
 $verbose && adb shell ifconfig
 
-# Ensure netd is running, as otherwise the logcat would be spammed
-# with the following messages on devices running Android O:
-#
-#   E NetdConnector: Communications error: java.io.IOException: No such file or directory
-#   E mDnsConnector: Communications error: java.io.IOException: No such file or directory
-#
-# Netd was initially disabled as an attempt to solve issues with
-# network-related libcore and JDWP tests failing on devices running
-# Android O (MR1) (see b/74725685). These tests are currently
-# disabled. When a better solution has been found, we should remove
-# the following lines.
-echo -e "${green}Turning on netd${nc}"
-adb shell start netd
-$verbose && adb shell getprop init.svc.netd
-
 if $verbose; then
   echo -e "${green}List properties${nc}"
   adb shell getprop