Remove dead includes in folly/io

Reviewed By: yfeldblum

Differential Revision: D27461546

fbshipit-source-id: 500ecd312b0b0ba15db7f373a3b6c7d633802846

folly/io/async/ssl/test/OpenSSLUtilsTest.cpp

@@ -21,7 +21,6 @@
 #include <folly/portability/OpenSSL.h>
 #include <folly/ssl/OpenSSLPtrTypes.h>
 
-using namespace ::testing;
 using namespace folly::ssl;
 
 namespace folly {

folly/io/async/test/AsyncSSLSocketTest.cpp

@@ -53,10 +53,6 @@
 #include <openssl/async.h>
 #endif
 
-#ifdef FOLLY_HAVE_MSG_ERRQUEUE
-#include <sys/utsname.h>
-#endif
-
 using std::cerr;
 using std::endl;
 using std::string;

folly/io/test/IOBufCursorTest.cpp

@@ -24,7 +24,6 @@
 #include <folly/portability/GTest.h>
 
 using folly::ByteRange;
-using folly::format;
 using folly::IOBuf;
 using folly::StringPiece;
 using std::unique_ptr;