Remove Hikey target

It has not been maintained for a while.

Change-Id: I047e986e5d0a998caa507d140b8c46a6fc08f689
diff --git a/BUILD.gn b/BUILD.gn
index 16fa673..e29a6f2 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -18,7 +18,6 @@
 group("root") {
   deps = [
     "//src:hafnium(:aem_v8a_fvp_clang)",
-    "//src:hafnium(:hikey_clang)",
     "//src:hafnium(:qemu_aarch64_clang)",
     "//src:hafnium(:rpi4_clang)",
   ]
@@ -82,20 +81,6 @@
   }
 }
 
-aarch64_toolchains("hikey") {
-  cpu = "cortex-a53"
-  origin_address = "0x35000000"
-  boot_flow = "//src/boot_flow:android"
-  console = "//src/arch/aarch64/pl011"
-  gic_version = 2
-  heap_pages = 60
-  max_cpus = 8
-  max_vms = 16
-  toolchain_args = {
-    pl011_base_address = "0xf7113000"  # UART3
-  }
-}
-
 aarch64_toolchains("rpi4") {
   cpu = "cortex-a72"
   origin_address = "0x80000"
diff --git a/hikey/BUILD.gn b/hikey/BUILD.gn
deleted file mode 100644
index c9f8e10..0000000
--- a/hikey/BUILD.gn
+++ /dev/null
@@ -1,25 +0,0 @@
-# Copyright 2018 The Hafnium Authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-source_set("hikey") {
-  sources = [
-    "fdt.S",
-    "initrd.S",
-  ]
-  inputs = [
-    "fdt.dtb",
-    "initrd.img",
-  ]
-  include_dirs = [ "." ]
-}
diff --git a/hikey/fdt.S b/hikey/fdt.S
deleted file mode 100644
index 8528400..0000000
--- a/hikey/fdt.S
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Copyright 2018 The Hafnium Authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-.section .plat.fdt, "a"
-.incbin "fdt.dtb"
-# Pad with a page to accomodate modifications.
-# TODO: remove when FDT modification is removed.
-.fill 4096, 1, 0
diff --git a/hikey/fdt.dtb b/hikey/fdt.dtb
deleted file mode 100644
index 7b05018..0000000
--- a/hikey/fdt.dtb
+++ /dev/null
Binary files differ
diff --git a/hikey/initrd.S b/hikey/initrd.S
deleted file mode 100644
index 10f639f..0000000
--- a/hikey/initrd.S
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
- * Copyright 2018 The Hafnium Authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-.section .plat.initrd, "a"
-.incbin "initrd.img"
diff --git a/hikey/initrd.img b/hikey/initrd.img
deleted file mode 100644
index 9bdac5e..0000000
--- a/hikey/initrd.img
+++ /dev/null
Binary files differ