x86/vdso: Remove unused file

commit da861e1 ("x86, vdso: Get rid of the fake section mechanism")
left this file behind; nothing is using it anymore.

Signed-off-by: Jann Horn <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>

Author: thejh