[newlib-cygwin] Cygwin: clock.cc: Drop redundant Windows prototypes

[Corinna Vinschen]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=73aefcb5c23b9ca186746ad2df55f82741fff6bb

commit 73aefcb5c23b9ca186746ad2df55f82741fff6bb
Author: Corinna Vinschen <corinna@vinschen.de>
Date:   Thu Aug 4 21:13:15 2022 +0200

    Cygwin: clock.cc: Drop redundant Windows prototypes
    
    Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

Diff:
---
 winsup/cygwin/clock.cc | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/winsup/cygwin/clock.cc b/winsup/cygwin/clock.cc
index e010ed488..0c0bd9994 100644
--- a/winsup/cygwin/clock.cc
+++ b/winsup/cygwin/clock.cc
@@ -142,9 +142,6 @@ clk_thread_t::now (clockid_t clockid, struct timespec *ts)
   return 0;
 }
 
-extern "C" void WINAPI QueryUnbiasedInterruptTimePrecise (PULONGLONG);
-extern "C" void WINAPI QueryInterruptTimePrecise (PULONGLONG);
-
 int
 clk_monotonic_t::now (clockid_t clockid, struct timespec *ts)
 {