Maintenance: tidy up header includes (r-lib#231)

Author: shikokuchuo

src/later.cpp

@@ -1,6 +1,5 @@
 #include "later.h"
 #include <Rcpp.h>
-#include <map>
 #include <queue>
 #include <memory>
 #include "debug.h"

src/threadutils.h

@@ -2,7 +2,6 @@
 #define _THREADUTILS_H_
 
 #include <stdexcept>
-#include <sys/time.h>
 #include <type_traits>
 
 #include "tinycthread.h"

src/timeconv.h

@@ -1,7 +1,6 @@
 #ifndef _LATER_TIMECONV_H_
 #define _LATER_TIMECONV_H_
 
-#include <sys/time.h>
 // Some platforms (Win32, previously some Mac versions) use
 // tinycthread.h to provide timespec. Whether tinycthread
 // defines timespec or not, we want it to be consistent for

src/timer_posix.cpp

@@ -1,8 +1,5 @@
 #ifndef _WIN32
 
-#include <errno.h>
-#include <sys/time.h>
-
 #include "timer_posix.h"
 
 int Timer::bg_main_func(void* data) {

src/timestamp_unix.cpp

@@ -1,6 +1,5 @@
 #ifndef _WIN32
 
-#include <sys/time.h>
 #include "timestamp.h"
 #include "timeconv.h"
 
@@ -18,32 +17,32 @@ class TimestampImplPosix : public TimestampImpl {
   TimestampImplPosix() {
     get_current_time(&this->time);
   }
-  
+
   TimestampImplPosix(double secs) {
     get_current_time(&this->time);
-    
+
     this->time = addSeconds(this->time, secs);
   }
-  
+
   virtual bool future() const {
     timespec now;
     get_current_time(&now);
     return this->time.tv_sec > now.tv_sec ||
       (this->time.tv_sec == now.tv_sec && this->time.tv_nsec > now.tv_nsec);
   }
-  
+
   virtual bool less(const TimestampImpl* other) const {
     const TimestampImplPosix* other_impl = dynamic_cast<const TimestampImplPosix*>(other);
     return this->time.tv_sec < other_impl->time.tv_sec ||
       (this->time.tv_sec == other_impl->time.tv_sec && this->time.tv_nsec < other_impl->time.tv_nsec);
   }
-  
+
   virtual bool greater(const TimestampImpl* other) const {
     const TimestampImplPosix* other_impl = dynamic_cast<const TimestampImplPosix*>(other);
     return this->time.tv_sec > other_impl->time.tv_sec ||
       (this->time.tv_sec == other_impl->time.tv_sec && this->time.tv_nsec > other_impl->time.tv_nsec);
   }
-  
+
   virtual double diff_secs(const TimestampImpl* other) const {
     const TimestampImplPosix* other_impl = dynamic_cast<const TimestampImplPosix*>(other);
     double sec_diff = this->time.tv_sec - other_impl->time.tv_sec;