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/fatal.js.txt b/test/binaryen.js/fatal.js.txt
deleted file mode 100644
index afd3ca587..000000000
--- a/test/binaryen.js/fatal.js.txt
+++ /dev/null
@@ -1 +0,0 @@
-Fatal: Module::addFunctionType: vI already exists