crt: Remove some functions from KERNEL32.DEF

MSDN says they are exported from ADVAPI32.DLL:

  * CreateProcessAsUserA
  * CreateProcessAsUserW
  * OpenThreadToken
  * SetThreadToken

Reference: https://sourceforge.net/p/mingw-w64/mailman/message/37646913/
Reference: https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createprocessasusera
Reference: https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createprocessasuserw
Reference: https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-openthreadtoken
Reference: https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-setthreadtoken
Signed-off-by: LIU Hao <lh_mouse@126.com>
diff --git a/mingw-w64-crt/lib-common/kernel32.def.in b/mingw-w64-crt/lib-common/kernel32.def.in
index ca13080..fb974cd 100644
--- a/mingw-w64-crt/lib-common/kernel32.def.in
+++ b/mingw-w64-crt/lib-common/kernel32.def.in
@@ -236,8 +236,9 @@
 CreatePrivateNamespaceA
 CreatePrivateNamespaceW
 CreateProcessA
-CreateProcessAsUserA
-CreateProcessAsUserW
+; MSDN says these are exported from ADVAPI32.DLL.
+; CreateProcessAsUserA
+; CreateProcessAsUserW
 CreateProcessInternalA
 CreateProcessInternalW
 CreateProcessW
@@ -1081,7 +1082,8 @@
 OpenState
 OpenStateExplicit
 OpenThread
-;OpenThreadToken
+; MSDN says this is exported from ADVAPI32.DLL.
+; OpenThreadToken
 OpenWaitableTimerA
 OpenWaitableTimerW
 OutputDebugStringA
@@ -1439,7 +1441,8 @@
 SetThreadPriorityBoost
 SetThreadSelectedCpuSets
 SetThreadStackGuarantee
-SetThreadToken
+; MSDN says this is exported from ADVAPI32.DLL.
+; SetThreadToken
 SetThreadUILanguage
 SetThreadpoolStackInformation
 SetThreadpoolThreadMaximum