fix(lsp): allow on disk files to change (denoland#9746)

Fixes denoland#9348

cli/lsp/sources.rs

@@ -163,14 +163,6 @@ impl Sources {
  self.0.lock().unwrap().contains_key(specifier)
  }
 
- /// Provides the length of the source content, calculated in a way that should
- /// match the behavior of JavaScript, where strings are stored effectively as
- /// `&[u16]` and when counting "chars" we need to represent the string as a
- /// UTF-16 string in Rust.
- pub fn get_length_utf16(&self, specifier: &ModuleSpecifier) -> Option<usize> {
- self.0.lock().unwrap().get_length_utf16(specifier)
- }
-
  pub fn get_line_index(
  &self,
  specifier: &ModuleSpecifier,
@@ -248,13 +240,6 @@ impl Inner {
  false
  }
 
- fn get_length_utf16(&mut self, specifier: &ModuleSpecifier) -> Option<usize> {
- let specifier =
- resolve_specifier(specifier, &mut self.redirects, &self.http_cache)?;
- let metadata = self.get_metadata(&specifier)?;
- Some(metadata.length_utf16)
- }
-
  fn get_line_index(
  &mut self,
  specifier: &ModuleSpecifier,
@@ -471,19 +456,6 @@ mod tests {
  assert_eq!(actual, "console.log(\"Hello World\");\n");
  }
 
- #[test]
- fn test_sources_get_length_utf16() {
- let (sources, _) = setup();
- let c = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap());
- let tests = c.join("tests");
- let specifier =
- resolve_path(&tests.join("001_hello.js").to_string_lossy()).unwrap();
- let actual = sources.get_length_utf16(&specifier);
- assert!(actual.is_some());
- let actual = actual.unwrap();
- assert_eq!(actual, 28);
- }
-
  #[test]
  fn test_resolve_dependency_types() {
  let (sources, location) = setup();