mutex include cleanup.

Change-Id: I63d4184260d204a9d5f7658ad51fbe63dbb3c9e4
Signed-off-by: Michael Meeks <michael.meeks@collabora.com>

PROBLEMS

@@ -35,10 +35,6 @@
   poll() calls to be without timeout. Or something similar, depending
   on case.
 
-- Recursive mutexes are evil. The last remaining instances should be
-  removed from the Kit/ChildSession.cppp as/when we move to a single
-  threaded Kit process.
-
 - Occasionally Control-C (SIGINT) doesn't shut down coolwsd. One has
   to kill it with SIGKILL. Which of course leaves all the chroot jails
   around. Hitting Control-C a second time will attempt a faster, and

common/SigUtil.cpp

@@ -29,7 +29,6 @@
 #include <fstream>
 #include <iomanip>
 #include <iostream>
-#include <mutex>
 #include <sstream>
 #include <string>
 #include <thread>

net/DelaySocket.cpp

@@ -10,7 +10,6 @@
 #include <net/DelaySocket.hpp>
 
 #include <memory>
-#include <mutex>
 
 #define DELAY_LOG(X) std::cerr << X << '\n';
 

net/DelaySocket.hpp

@@ -9,8 +9,6 @@
 
 #include <Socket.hpp>
 
-#include <mutex>
-
 /// Simulates network latency for local debugging.
 ///
 /// We are lifecycle managed internally based on the physical /

wsd/Admin.cpp

@@ -9,7 +9,6 @@
 #include <config.h>
 
 #include <cassert>
-#include <mutex>
 #include <sys/poll.h>
 #include <unistd.h>
 

wsd/Admin.hpp

@@ -7,8 +7,6 @@
 
 #pragma once
 
-#include <mutex>
-
 #include "AdminModel.hpp"
 #include "Log.hpp"