ARM: omap3_beagle: Remove non-DM initialization

With DM_MMC working for both SPL and U-Boot, this patch removes
the legacy style of initializing the MMC driver.

Based on omap3_logic: 42140dd0962bc134c0aad27524d0f4cc3955f255.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index 888a958..d5a122a 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -501,13 +501,6 @@
 }
 
 #if defined(CONFIG_MMC)
-int board_mmc_init(struct bd_info *bis)
-{
-	return omap_mmc_init(0, 0, 0, -1, -1);
-}
-#endif
-
-#if defined(CONFIG_MMC)
 void board_mmc_power_init(void)
 {
 	twl4030_power_mmc_init(0);