message: Remove obsolete comment and variables.
  Expound upon comment. Fix typo.
diff: @@ -65,15 +65,7 @@ impl Compiler for LLVMCompiler {
  //let data = Arc::new(Mutex::new(0));
  let mut func_names = SecondaryMap::new();
  - // We're going to "link" the sections by simply appending all compatible
  - // sections, then building the new relocations.
  - // TODO: merge constants.
  - let mut used_readonly_section = false;
  - let mut readonly_section = CustomSection {
  - protection: CustomSectionProtection::Read,
  - bytes: SectionBody::default(),
  - relocations: vec![],
  - };
  + // TODO: merge constants in sections.
  for (func_index, _) in &module.functions {
  func_names[func_index] = module
  @@ -153,6 +145,6 @@ impl Compiler for LLVMCompiler {
  module: &Module,
  ) -> Result<PrimaryMap<FunctionIndex, FunctionBody>, CompileError> {
  Ok(PrimaryMap::new())
  - // unimplemented!("Dynamic funciton trampolines not yet implemented");
  + // unimplemented!("Dynamic function trampolines not yet implemented");
  }
  }
  