remove dep on Win32-extras

Win32 now has its own getCurrentProcessId.

Utility/PID.hs

@@ -13,8 +13,7 @@ module Utility.PID where
 import System.Posix.Types (ProcessID)
 import System.Posix.Process (getProcessID)
 #else
-import System.Win32.Process (ProcessId)
-import System.Win32.Process.Current (getCurrentProcessId)
+import System.Win32.Process (ProcessId, getCurrentProcessId)
 #endif
 
 #ifndef mingw32_HOST_OS

git-annex.cabal

@@ -381,8 +381,7 @@ Executable git-annex
 
   if (os(windows))
     Build-Depends:
-      Win32 (== 2.3.1.1),
-      Win32-extras,
+      Win32 (>= 2.6.1.0),
       unix-compat (>= 0.5),
       setenv,
       process (>= 1.4.2.0)

stack-windows.yaml

@@ -23,7 +23,6 @@ extra-deps:
 - yesod-default-1.2.0
 - Win32-2.6.1.0
 - unix-compat-0.5
-allow-newer: true
 explicit-setup-deps:
   git-annex: true
 resolver: lts-9.10