[stdlib] Excise #include <iostream> from Metadata.cpp. (SR-7164)
diff --git a/stdlib/public/runtime/Metadata.cpp b/stdlib/public/runtime/Metadata.cpp
index 6426937..6750dde 100644
--- a/stdlib/public/runtime/Metadata.cpp
+++ b/stdlib/public/runtime/Metadata.cpp
@@ -30,7 +30,6 @@
 #include <algorithm>
 #include <cctype>
 #include <condition_variable>
-#include <iostream>
 #include <new>
 #if defined(_WIN32)
 #define WIN32_LEAN_AND_MEAN