Remove the obsolete location check for install-recovery.sh

The script has been moved to /system/bin since L.

Bug: 35411009
Test: Generate a exact same OTA for bullhead.
Change-Id: Iaecb86e3dabc5b659605837bb06f16d20fa80334

tools/releasetools/common.py

@@ -1596,7 +1596,6 @@ def MakeRecoveryPatch(input_dir, output_sink, recovery_img, boot_img,
     info_dict = OPTIONS.info_dict
 
   full_recovery_image = info_dict.get("full_recovery_image", None) == "true"
-  system_root_image = info_dict.get("system_root_image", None) == "true"
 
   if full_recovery_image:
     output_sink("etc/recovery.img", recovery_img.data)
@@ -1652,30 +1651,8 @@ fi
        'bonus_args': bonus_args}
 
   # The install script location moved from /system/etc to /system/bin
-  # in the L release.  Parse init.*.rc files to find out where the
-  # target-files expects it to be, and put it there.
-  sh_location = "etc/install-recovery.sh"
-  found = False
-  if system_root_image:
-    init_rc_dir = os.path.join(input_dir, "ROOT")
-  else:
-    init_rc_dir = os.path.join(input_dir, "BOOT", "RAMDISK")
-  init_rc_files = os.listdir(init_rc_dir)
-  for init_rc_file in init_rc_files:
-    if (not init_rc_file.startswith('init.') or
-        not init_rc_file.endswith('.rc')):
-      continue
-
-    with open(os.path.join(init_rc_dir, init_rc_file)) as f:
-      for line in f:
-        m = re.match(r"^service flash_recovery /system/(\S+)\s*$", line)
-        if m:
-          sh_location = m.group(1)
-          found = True
-          break
-
-    if found:
-      break
+  # in the L release.
+  sh_location = "bin/install-recovery.sh"
 
   print("putting script in", sh_location)