Revert "MB-41209: Use specific 'Winsock2.h' header for timeval"

This reverts commit 7dd8241.

Reason for revert: causes build failure in cheshire-cat CE (http://server.jenkins.couchbase.com/job/couchbase-server-windows/3183)

Change-Id: I71b6242d9fff9f6143d14e9996b20325df1b2dbd
Reviewed-on: http://review.couchbase.org/c/forestdb/+/135489
Tested-by: Dave Rigby <[email protected]>
Reviewed-by: Dave Rigby <[email protected]>

Author: daverigby

utils/gettimeofday_vs.h

@@ -2,7 +2,7 @@
 #define _JSAHN_GETTIMEOFDAY_VS
 
 #include <time.h>
-#include <Winsock2.h> // for timeval
+#include <Windows.h>
 
 #ifdef __cplusplus
 extern "C" {

utils/time_utils.h

@@ -20,7 +20,7 @@
 
 #include <time.h>
 #if defined(WIN32) || defined(_WIN32)
-#include <Winsock2.h> // for timeval
+#include <Windows.h>
 #else
 #include <sys/time.h>
 #include <unistd.h>