Remove the action and context modules from wasmtime_jit (#924)

* Remove the `action` and `context` modules from `wasmtime_jit`

These modules are now no longer necessary with the `wasmtime` crate
fleshed out, and they're entirely subsumed by the `wasmtime` API as
well.

* Remove some more modules

crates/api/src/values.rs

@@ -3,7 +3,6 @@ use crate::{Func, Store, ValType};
 use anyhow::{bail, Result};
 use std::ptr;
 use wasmtime_environ::ir;
-use wasmtime_jit::RuntimeValue;
 
 /// Possible runtime values that a WebAssembly module can either consume or
 /// produce.
@@ -172,18 +171,6 @@ impl From<Func> for Val {
     }
 }
 
-impl From<RuntimeValue> for Val {
-    fn from(rv: RuntimeValue) -> Self {
-        match rv {
-            RuntimeValue::I32(i) => Val::I32(i),
-            RuntimeValue::I64(i) => Val::I64(i),
-            RuntimeValue::F32(u) => Val::F32(u),
-            RuntimeValue::F64(u) => Val::F64(u),
-            RuntimeValue::V128(u) => Val::V128(u128::from_le_bytes(u)),
-        }
-    }
-}
-
 pub(crate) fn into_checked_anyfunc(
     val: Val,
     store: &Store,