surya: commonize ota fixes

Android.mk

@@ -1,18 +1,14 @@
 #
 # Copyright 2018 The Android Open Source Project
-# Copyright 2014-2022 The Team Win LLC
+# Copyright 2014-2023 The Team Win LLC
 #
 # SPDX-License-Identifier: Apache-2.0
 #
-
 LOCAL_PATH := $(call my-dir)
-
 ifeq ($(TARGET_DEVICE),surya)
 include $(call all-subdir-makefiles,$(LOCAL_PATH))
 
 # Hack some props to allow stock ROM flashing
 BOARD_RECOVERY_IMAGE_PREPARE := \
-    sed -i 's/ro.product.board=.*/ro.product.board=surya/' $(TARGET_RECOVERY_ROOT_OUT)/prop.default; \
-    sed -i 's/ro.bootimage.build.date.utc=.*/ro.bootimage.build.date.utc=0/' $(TARGET_RECOVERY_ROOT_OUT)/prop.default; \
-    sed -i 's/ro.build.date.utc=.*/ro.build.date.utc=0/' $(TARGET_RECOVERY_ROOT_OUT)/prop.default;
+    sed -i 's/ro.product.board=.*/ro.product.board=surya/' $(TARGET_RECOVERY_ROOT_OUT)/prop.default;
 endif