[WebAssembly] Remove unused header

This header used to be needed here for the `OutRelocation` struct
but that no longer exists.

Differential Revision: https://reviews.llvm.org/D43516

llvm-svn: 325608

lld/wasm/InputChunks.h

@@ -17,7 +17,6 @@
 
 #include "Config.h"
 #include "InputFiles.h"
-#include "WriterUtils.h"
 #include "lld/Common/ErrorHandler.h"
 #include "llvm/Object/Wasm.h"
 

lld/wasm/InputFiles.h

@@ -18,7 +18,6 @@
 #include "llvm/Support/MemoryBuffer.h"
 
 #include "Symbols.h"
-#include "WriterUtils.h"
 
 #include <vector>