Make std* blocking file-descriptors.

runtime/bin/platform_linux.cc

Index: runtime/bin/platform_linux.cc
diff --git a/runtime/bin/platform_linux.cc b/runtime/bin/platform_linux.cc
index 89031a110822de4fe4f03977cd19598fecfde6f8..7f379365ff5b57faab94d6a194b65d025c8061dc 100644
--- a/runtime/bin/platform_linux.cc
+++ b/runtime/bin/platform_linux.cc
@@ -66,24 +66,6 @@ void Platform::FreeEnvironment(char** env, intptr_t count) {
   delete[] env;
 }
 
-
-void Platform::PrintBlocking(FILE* file, const char* format, ...) {
-  int fd = fileno(file);
-  FDUtils::SetBlocking(fd);
-  va_list args;
-  va_start(args, format);
-  vfprintf(file, format, args);
-  fflush(file);
-  va_end(args);
-  FDUtils::SetNonBlocking(fd);
-}
-
-
-void Platform::Cleanup() {
-  FDUtils::SetBlocking(fileno(stdout));
-  FDUtils::SetBlocking(fileno(stderr));
-}
-
 }  // namespace bin
 }  // namespace dart