Remove dhcpcd runtest definition.

The external/dhcpcd tree is done.

Bug: 26991160
Change-Id: I179581454b672adc46914bfb472c61b3dc01ca62
diff --git a/testrunner/test_defs.xml b/testrunner/test_defs.xml
index 41911eb..46ed2ab 100644
--- a/testrunner/test_defs.xml
+++ b/testrunner/test_defs.xml
@@ -402,11 +402,6 @@
     build_path="external/android-clat"
     description="clatd unit tests." />
 
-<!-- dhcpcd -->
-<test-native name="dhcpcd"
-    build_path="external/dhcpcd"
-    description="dhcpcd unit tests." />
-
 <!-- Libjingle -->
 <test-native name="libjingle"
     build_path="vendor/google/libraries/libjingle"