Remove FunctionType (#2510)

Function signatures were previously redundantly stored on Function
objects as well as on FunctionType objects. These two signature
representations had to always be kept in sync, which was error-prone
and needlessly complex. This PR takes advantage of the new ability of
Type to represent multiple value types by consolidating function
signatures as a pair of Types (params and results) stored on the
Function object.

Since there are no longer module-global named function types,
significant changes had to be made to the printing and emitting of
function types, as well as their parsing and manipulation in various
passes.

The C and JS APIs and their tests also had to be updated to remove
named function types.

1 files changed, 0 insertions, 1 deletions

diff --git a/test/binaryen.js/custom-section.js.txt b/test/binaryen.js/custom-section.js.txt
index 7ac835fdf..e4e8e85d6 100644
--- a/test/binaryen.js/custom-section.js.txt
+++ b/test/binaryen.js/custom-section.js.txt
@@ -3,7 +3,6 @@
 #include <map>
 #include "binaryen-c.h"
 int main() {
-  std::map<size_t, BinaryenFunctionTypeRef> functionTypes;
   std::map<size_t, BinaryenExpressionRef> expressions;
   std::map<size_t, BinaryenFunctionRef> functions;
   std::map<size_t, BinaryenGlobalRef> globals;