Re-land: releasetools: Deprecate GKI build rules

(Re-land of Ie882fccd864920289e48366e99a4ebd67e784d0d)

We no longer build GKIs from the platform tree.
These build commands were neither used nor maintained anymore, so clean
them up to reduce maintenance effort.
Keep the command line options as no-op, so existing scripts that still
specifies the deprecated options don't break.

Bug: 229701033
Test: presubmit
Change-Id: I0f7d05562dbc3eed29e902d6dc9a0f2e4083aaa6

tools/releasetools/sign_target_files_apks.py

@@ -124,14 +124,8 @@ Usage:  sign_target_files_apks [flags] input_target_files output_target_files
 
   --gki_signing_algorithm <algorithm>
   --gki_signing_key <key>
-      Use the specified algorithm (e.g. SHA256_RSA4096) and the key to generate
-      'boot signature' in a v4 boot.img. Otherwise it uses the existing values
-      in info dict.
-
   --gki_signing_extra_args <args>
-      Specify any additional args that are needed to generate 'boot signature'
-      (e.g. --prop foo:bar). The args will be appended to the existing ones
-      in info dict.
+      DEPRECATED Does nothing.
 
   --android_jar_path <path>
       Path to the android.jar to repack the apex file.
@@ -221,9 +215,6 @@ OPTIONS.tag_changes = ("-test-keys", "-dev-keys", "+release-keys")
 OPTIONS.avb_keys = {}
 OPTIONS.avb_algorithms = {}
 OPTIONS.avb_extra_args = {}
-OPTIONS.gki_signing_key = None
-OPTIONS.gki_signing_algorithm = None
-OPTIONS.gki_signing_extra_args = None
 OPTIONS.android_jar_path = None
 OPTIONS.vendor_partitions = set()
 OPTIONS.vendor_otatools = None
@@ -595,7 +586,7 @@ def ProcessTargetFiles(input_tf_zip: zipfile.ZipFile, output_tf_zip, misc_info,
         [len(os.path.basename(i.filename)) for i in input_tf_zip.infolist()
          if GetApkFileInfo(i.filename, compressed_extension, [])[0]])
   except ValueError:
-    # Sets this to zero for targets without APK files, e.g., gki_arm64.
+    # Sets this to zero for targets without APK files.
     maxsize = 0
 
   for info in input_tf_zip.infolist():
@@ -818,9 +809,6 @@ def ProcessTargetFiles(input_tf_zip: zipfile.ZipFile, output_tf_zip, misc_info,
   if misc_info.get('avb_enable') == 'true':
     RewriteAvbProps(misc_info)
 
-  # Replace the GKI signing key for boot.img, if any.
-  ReplaceGkiSigningKey(misc_info)
-
   # Write back misc_info with the latest values.
   ReplaceMiscInfoTxt(input_tf_zip, output_tf_zip, misc_info)
 
@@ -1102,27 +1090,6 @@ def RewriteAvbProps(misc_info):
       misc_info[args_key] = result
 
 
-def ReplaceGkiSigningKey(misc_info):
-  """Replaces the GKI signing key."""
-
-  key = OPTIONS.gki_signing_key
-  if not key:
-    return
-
-  algorithm = OPTIONS.gki_signing_algorithm
-  if not algorithm:
-    raise ValueError("Missing --gki_signing_algorithm")
-
-  print('Replacing GKI signing key with "%s" (%s)' % (key, algorithm))
-  misc_info["gki_signing_algorithm"] = algorithm
-  misc_info["gki_signing_key_path"] = key
-
-  extra_args = OPTIONS.gki_signing_extra_args
-  if extra_args:
-    print('Setting GKI signing args: "%s"' % (extra_args))
-    misc_info["gki_signing_signature_args"] = extra_args
-
-
 def BuildKeyMap(misc_info, key_mapping_options):
   for s, d in key_mapping_options:
     if s is None:   # -d option
@@ -1477,12 +1444,6 @@ def main(argv):
       # 'oem=--signing_helper_with_files=/tmp/avbsigner.sh'.
       partition, extra_args = a.split("=", 1)
       OPTIONS.avb_extra_args[partition] = extra_args
-    elif o == "--gki_signing_key":
-      OPTIONS.gki_signing_key = a
-    elif o == "--gki_signing_algorithm":
-      OPTIONS.gki_signing_algorithm = a
-    elif o == "--gki_signing_extra_args":
-      OPTIONS.gki_signing_extra_args = a
     elif o == "--vendor_otatools":
       OPTIONS.vendor_otatools = a
     elif o == "--vendor_partitions":
@@ -1493,6 +1454,8 @@ def main(argv):
       OPTIONS.override_apk_keys = a
     elif o == "--override_apex_keys":
       OPTIONS.override_apex_keys = a
+    elif o in ("--gki_signing_key",  "--gki_signing_algorithm",  "--gki_signing_extra_args"):
+      print(f"{o} is deprecated and does nothing")
     else:
       return False
     return True