kallsyms: remove print_symbol() function

No more print_symbol()/__print_symbol() users left, remove these
symbols.

It was a very old API that encouraged people use continuous lines.
It had been obsoleted by %pS format specifier in a normal printk()
call.

Link: http://lkml.kernel.org/r/20180105102538.GC471@jagdpanzerIV
Cc: Andrew Morton <[email protected]>
Cc: Russell King <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Mark Salter <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: David Howells <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Fengguang Wu <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: LKML <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Sergey Senozhatsky <[email protected]>
Signed-off-by: Sergey Senozhatsky <[email protected]>
Suggested-by: Joe Perches <[email protected]>
[[email protected]: updated commit message]
Signed-off-by: Petr Mladek <[email protected]>

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