Revert of Accurately type foreign functions, and variables.

src/typing-asm.h

Index: src/typing-asm.h
diff --git a/src/typing-asm.h b/src/typing-asm.h
index 63e204e50a7cdac4cdcc128098b622845ea01754..b7f53831e6222d96d6552351d55fa7bd7e235db7 100644
--- a/src/typing-asm.h
+++ b/src/typing-asm.h
@@ -113,7 +113,6 @@
 
   bool in_function_;  // In module function?
   bool building_function_tables_;
-  bool visiting_exports_;
 
   TypeCache const& cache_;
 
@@ -162,8 +161,6 @@
 
   void VisitLiteral(Literal* expr, bool is_return);
 
-  void VisitVariableProxy(VariableProxy* expr, bool assignment);
-
   void VisitIntegerBitwiseOperator(BinaryOperation* expr, Type* left_expected,
                                    Type* right_expected, Type* result_type,
                                    bool conversion);