cranelift-wasm: Remove ModuleTranslationState (#5365)

* cranelift-wasm: Remove `ModuleTranslationState`

We were putting data into it, but never reading data out of it. Can be removed.

* cranelift-wasm: move `funct_state.rs` sub module to `state.rs`

Since it is the only submodule of `state` it can just be the whole `state`
module.

cranelift/wasm/src/module_translator.rs

@@ -6,7 +6,6 @@ use crate::sections_translator::{
     parse_global_section, parse_import_section, parse_memory_section, parse_name_section,
     parse_start_section, parse_table_section, parse_tag_section, parse_type_section,
 };
-use crate::state::ModuleTranslationState;
 use crate::WasmResult;
 use cranelift_codegen::timing;
 use std::prelude::v1::*;
@@ -17,9 +16,8 @@ use wasmparser::{NameSectionReader, Parser, Payload, Validator};
 pub fn translate_module<'data>(
     data: &'data [u8],
     environ: &mut dyn ModuleEnvironment<'data>,
-) -> WasmResult<ModuleTranslationState> {
+) -> WasmResult<()> {
     let _tt = timing::wasm_translate_module();
-    let mut module_translation_state = ModuleTranslationState::new();
     let mut validator = Validator::new_with_features(environ.wasm_features());
 
     for payload in Parser::new(0).parse_all(data) {
@@ -37,7 +35,7 @@ pub fn translate_module<'data>(
 
             Payload::TypeSection(types) => {
                 validator.type_section(&types)?;
-                parse_type_section(types, &mut module_translation_state, environ)?;
+                parse_type_section(types, environ)?;
             }
 
             Payload::ImportSection(imports) => {
@@ -127,5 +125,5 @@ pub fn translate_module<'data>(
         }
     }
 
-    Ok(module_translation_state)
+    Ok(())
 }