utils/fbtest: drop Build/Prepare rule in favor of default one

Signed-off-by: Alexandru Ardelean <[email protected]>

package/utils/fbtest/Makefile

@@ -21,11 +21,6 @@ define Package/fbtest
   DEPENDS:=@DISPLAY_SUPPORT
 endef
 
-define Build/Prepare
-	mkdir -p $(PKG_BUILD_DIR)
-	$(CP) ./src/* $(PKG_BUILD_DIR)/
-endef
-
 define Build/Configure
 endef