Revert "init: Wait for /dev/hvc1 during ARCVM first-stage mount"

This reverts commit b885e4ad53.

Reason for revert: No longer needed (using virtio-blk instead)

Change-Id: I667f0d4f58060e781a5e9b21c778cd568b92971a

init/first_stage_mount.cpp

@@ -305,11 +305,6 @@ bool FirstStageMountVBootV2::InitDevices() {
             return false;
         }
     }
-
-    if (IsArcvm() && !block_dev_init_.InitHvcDevice("hvc1")) {
-        return false;
-    }
-
     return true;
 }
 

init/selinux.cpp

@@ -474,8 +474,6 @@ void SelinuxRestoreContext() {
     RestoreconIfExists(SnapshotManager::GetGlobalRollbackIndicatorPath().c_str(), 0);
     RestoreconIfExists("/metadata/gsi",
                        SELINUX_ANDROID_RESTORECON_RECURSE | SELINUX_ANDROID_RESTORECON_SKIP_SEHASH);
-
-    RestoreconIfExists("/dev/hvc1", 0);
 }
 
 int SelinuxKlogCallback(int type, const char* fmt, ...) {

init/util.h

@@ -18,7 +18,6 @@
 
 #include <sys/stat.h>
 #include <sys/types.h>
-#include <sys/unistd.h>
 
 #include <chrono>
 #include <functional>
@@ -109,10 +108,6 @@ inline constexpr bool IsMicrodroid() {
 #endif
 }
 
-inline bool IsArcvm() {
-    return !access("/is_arcvm", F_OK);
-}
-
 bool Has32BitAbi();
 
 std::string GetApexNameFromFileName(const std::string& path);