[source] utils/spidev_test: drop Build/Prepare rule in favor of default one

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/9f2ce12fffb24e066f7409e62289a62b0a313f63

commit 9f2ce12fffb24e066f7409e62289a62b0a313f63
Author: Alexandru Ardelean <ardeleanalex at gmail.com>
AuthorDate: Thu Oct 6 09:21:58 2016 +0300

    utils/spidev_test: drop Build/Prepare rule in favor of default one
    
    Signed-off-by: Alexandru Ardelean <ardeleanalex at gmail.com>
---
 package/utils/spidev_test/Makefile | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/package/utils/spidev_test/Makefile b/package/utils/spidev_test/Makefile
index e92bf63..b7c5227 100644
--- a/package/utils/spidev_test/Makefile
+++ b/package/utils/spidev_test/Makefile
@@ -27,10 +27,6 @@ define Package/spidev-test/description
   SPI testing utility.
 endef
 
-define Build/Prepare
-	$(CP) src/spidev_test.c $(PKG_BUILD_DIR)/
-endef
-
 define Build/Compile
 	$(TARGET_CC) $(TARGET_CFLAGS) -o $(PKG_BUILD_DIR)/spidev_test \
 		$(PKG_BUILD_DIR)/spidev_test.c