clk: composite: Drop unused clk.h include

This include isn't used. Drop it.
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lkml.kernel.org/r/20190815042500.9519-1-sboyd@kernel.org

drivers/clk/clk-composite.c

@@ -3,7 +3,6 @@
  * Copyright (c) 2013 NVIDIA CORPORATION.  All rights reserved.
  */
 
-#include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/err.h>
 #include <linux/slab.h>