Remove TypeConverter and Module from minimal subzero build.

src/IceTypeConverter.h

Index: src/IceTypeConverter.h
diff --git a/src/IceTypeConverter.h b/src/IceTypeConverter.h
index 32865a6f470676689fea485e42868f2b19448ee4..83b8f72850543ea96d4824d81fa06573429a6963 100644
--- a/src/IceTypeConverter.h
+++ b/src/IceTypeConverter.h
@@ -50,9 +50,6 @@ public:
     return Pos->second;
   }
 
-  /// Returns ICE model of pointer type.
-  Type getIcePointerType() const { return IceType_i32; }
-
 private:
   // The list of allowable LLVM types. Indexed by ICE type.
   std::vector<llvm::Type *> LLVMTypes;