[ELF] Symbols.h: remove #include "InputFiles.h"

Author: MaskRay

lld/ELF/SymbolTable.h

@@ -17,6 +17,7 @@ namespace lld {
 namespace elf {
 
 class InputFile;
+class SharedFile;
 
 // SymbolTable is a bucket of all known symbols, including defined,
 // undefined, or lazy symbols (the last one is symbols in archive

lld/ELF/Symbols.h

@@ -14,7 +14,6 @@
 #define LLD_ELF_SYMBOLS_H
 
 #include "Config.h"
-#include "InputFiles.h"
 #include "lld/Common/LLVM.h"
 #include "lld/Common/Memory.h"
 #include "llvm/ADT/DenseMap.h"