Diff reduction: Remove unnecessary forward declarations.

dmd2/aggregate.h

@@ -20,12 +20,6 @@
 #include "dsymbol.h"
 #include "declaration.h"
 
-#if IN_LLVM
-#include <vector>
-#include <set>
-#include <map>
-#endif
-
 struct Identifier;
 struct Type;
 struct TypeFunction;
@@ -48,18 +42,6 @@ enum Sizeok
     SIZEOKfwd,          // error in computing size of aggregate
 };
 
-#if IN_LLVM
-struct ClassInfoDeclaration;
-namespace llvm
-{
-    class Type;
-    class Value;
-    class Constant;
-    class ConstantStruct;
-    class GlobalVariable;
-}
-#endif
-
 struct AggregateDeclaration : ScopeDsymbol
 {
     Type *type;