Revert "dumpsys: add option to list hardware services."

This reverts commit 6270dd1bf7f4a6eaa0e36b2cbb0f9bdd4790b5d8.

Reason for revert: obsolete, removed in favor of lshal
Test: dumpsys_test

Change-Id: I06e256a5bd0995727a3d6f3f88f79a623b1474f3
diff --git a/cmds/dumpsys/main.cpp b/cmds/dumpsys/main.cpp
index b180c98..8ba0eba 100644
--- a/cmds/dumpsys/main.cpp
+++ b/cmds/dumpsys/main.cpp
@@ -27,7 +27,6 @@
 #include <stdio.h>
 
 using namespace android;
-using HServiceManager = android::hidl::manager::V1_0::IServiceManager;
 
 int main(int argc, char* const argv[]) {
     signal(SIGPIPE, SIG_IGN);
@@ -39,8 +38,6 @@
         return 20;
     }
 
-    sp<HServiceManager> hm = HServiceManager::getService("manager");
-
-    Dumpsys dumpsys(sm.get(), hm.get());
+    Dumpsys dumpsys(sm.get());
     return dumpsys.main(argc, argv);
 }