disp: msm: dp: remove unused header declaration

Certain pll variables and function signatures are
obsolete and hence removing the header file
declaration containing these.

Change-Id: I93d4ff096ff253f21d67660287d6d3baa857cca1
Signed-off-by: Sandeep Gangadharaiah <[email protected]>

msm/dp/dp_pll_5nm.c

@@ -1,5 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
+ * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
  * Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
  */
 
@@ -17,7 +18,6 @@
  *
  */
 
-#include <dt-bindings/clock/mdss-5nm-pll-clk.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/err.h>