i2c: Remove board_i2c_init()

This function is not used, so drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/include/i2c.h b/include/i2c.h
index 4e59009..8d91b24 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -973,14 +973,6 @@
 };
 
 /**
- * Get FDT values for i2c bus.
- *
- * @param blob  Device tree blbo
- * Return: the number of I2C bus
- */
-void board_i2c_init(const void *blob);
-
-/**
  * Find the I2C bus number by given a FDT I2C node.
  *
  * @param blob  Device tree blbo