Do not check for winsock2.h

Signed-off-by: Ralph Giles <giles@thaumas.net>
Signed-off-by: evpobr <evpobr@gmail.com>

CMakeLists.txt

@@ -98,12 +98,7 @@ if(NOT OP_DISABLE_HTTP)
   include(CheckIncludeFile)
   include(CheckCSourceCompiles)
   cmake_push_check_state(RESET)
-  if(WIN32)
-    check_include_file("winsock2.h" OP_HAVE_WINSOCK2_H)
-    if(NOT OP_HAVE_WINSOCK2_H)
-      message(FATAL_ERROR "HTTP support requires a Winsock socket library")
-    endif()
-  else()
+  if(NOT WIN32)
     check_include_file("sys/socket.h" OP_HAVE_SYS_SOCKET_H)
     if(NOT OP_HAVE_SYS_SOCKET_H)
       message(FATAL_ERROR "HTTP support requires a POSIX socket library")