[gardening] Remove duplicate #include:s

Author: practicalswift

include/swift/Runtime/Config.h

@@ -17,6 +17,7 @@
 #ifndef SWIFT_RUNTIME_CONFIG_H
 #define SWIFT_RUNTIME_CONFIG_H
 
+// Bring in visibility attribute macros for library visibility.
 #include "llvm/Support/Compiler.h"
 
 /// Does the current Swift platform support "unbridged" interoperation
@@ -187,9 +188,6 @@
 
 #endif
 
-// Bring in visibility attribute macros for library visibility.
-#include "llvm/Support/Compiler.h"
-
 // Generates a name of the runtime entry's implementation by
 // adding an underscore as a prefix and a suffix.
 #define SWIFT_RT_ENTRY_IMPL(Name) _##Name##_

unittests/runtime/weak.mm

@@ -14,7 +14,6 @@
 #include <objc/runtime.h>
 #include "swift/Runtime/HeapObject.h"
 #include "swift/Runtime/Metadata.h"
-#include "swift/Runtime/Metadata.h"
 #include "gtest/gtest.h"
 
 using namespace swift;