x86/paravirt: Remove the unused pv_time_ops::get_tsc_khz method

x86/paravirt: Remove the unused pv_time_ops::get_tsc_khz method

It's not used anywhere.

Signed-off-by: Juergen Gross <[email protected]>
Acked-by: Rusty Russell <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Brian Gerst <[email protected]>
Cc: Denys Vlasenko <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>