Remove PSRWLOCK

Author: ChrisDenton

Diff for: std/src/sys/pal/windows/c.rs

@@ -21,9 +21,6 @@ pub type DWORD = c_ulong;
 pub type WCHAR = u16;
 pub type ULONG = c_ulong;
 
-#[cfg(target_vendor = "win7")]
-pub type PSRWLOCK = *mut SRWLOCK;
-
 pub type socklen_t = c_int;
 pub type ADDRESS_FAMILY = c_ushort;
 pub use FD_SET as fd_set;

Diff for: std/src/sys/sync/mutex/windows7.rs

@@ -25,7 +25,7 @@ unsafe impl Send for Mutex {}
 unsafe impl Sync for Mutex {}
 
 #[inline]
-pub unsafe fn raw(m: &Mutex) -> c::PSRWLOCK {
+pub unsafe fn raw(m: &Mutex) -> *mut c::SRWLOCK {
     m.srwlock.get()
 }