Don't export the 'Local' type from cton_wasm.

This type is not longer used in any public interface, it has become an
internal implementation detail.

Also remove some unused exported types from the crate.

lib/wasm/src/lib.rs

@@ -25,5 +25,5 @@ mod translation_utils;
 
 pub use module_translator::{translate_module, TranslationResult};
 pub use runtime::{FuncEnvironment, WasmRuntime, DummyRuntime};
-pub use translation_utils::{Local, FunctionIndex, GlobalIndex, TableIndex, MemoryIndex, RawByte,
-                            MemoryAddress, SignatureIndex, Global, GlobalInit, Table, Memory};
+pub use translation_utils::{FunctionIndex, GlobalIndex, TableIndex, MemoryIndex, SignatureIndex,
+                            Global, GlobalInit, Table, Memory};