Clean up Netd and libnetd_resolv for resolver related commands

1. remove all resolver related commands in netd
2. remove unused API in libnetd_resolv

Bug: 126141549
Test: built, flashed, booted
      system/netd/tests/runtests.sh pass

Change-Id: I35ac8f241eebd6284a6a685ef86cd77a1fce4388
diff --git a/server/Controllers.cpp b/server/Controllers.cpp
index a5c9eba..fb5509c 100644
--- a/server/Controllers.cpp
+++ b/server/Controllers.cpp
@@ -189,8 +189,7 @@
 }
 
 Controllers::Controllers()
-    : resolverCtrl(netCtrl),
-      clatdCtrl(&netCtrl),
+    : clatdCtrl(&netCtrl),
       wakeupCtrl(
               [this](const WakeupController::ReportArgs& args) {
                   const auto listener = eventReporter.getNetdEventListener();