[source] utils/nvram: 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/4786484afd3359357bf3ff95de67f1331be1a82f

commit 4786484afd3359357bf3ff95de67f1331be1a82f
Author: Alexandru Ardelean <ardeleanalex at gmail.com>
AuthorDate: Thu Oct 6 09:19:34 2016 +0300

    utils/nvram: drop Build/Prepare rule in favor of default one
    
    Signed-off-by: Alexandru Ardelean <ardeleanalex at gmail.com>
---
 package/utils/nvram/Makefile | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/package/utils/nvram/Makefile b/package/utils/nvram/Makefile
index c5a4ca4..acefe8a 100644
--- a/package/utils/nvram/Makefile
+++ b/package/utils/nvram/Makefile
@@ -29,11 +29,6 @@ define Package/nvram/description
  It works on bcm47xx (Linux 2.6) without using the kernel api.
 endef
 
-define Build/Prepare
-	mkdir -p $(PKG_BUILD_DIR)
-	$(CP) ./src/* $(PKG_BUILD_DIR)/
-endef
-
 define Build/Configure
 endef