chore: remove No*Permissions structs (#12316)

These are confusing. They say they are "for users that don't care about
permissions", but that isn't correct. `NoTimersPermissions` disables
permissions instead of enabling them.

I would argue that implementors should decide what permissions they want
themselves, and not take our opinionated permissions struct.

ext/fetch/lib.rs

@@ -120,19 +120,6 @@ pub trait FetchPermissions {
   fn check_read(&mut self, _p: &Path) -> Result<(), AnyError>;
 }
 
-/// For use with `op_fetch` when the user does not want permissions.
-pub struct NoFetchPermissions;
-
-impl FetchPermissions for NoFetchPermissions {
-  fn check_net_url(&mut self, _url: &Url) -> Result<(), AnyError> {
-    Ok(())
-  }
-
-  fn check_read(&mut self, _p: &Path) -> Result<(), AnyError> {
-    Ok(())
-  }
-}
-
 pub fn get_declaration() -> PathBuf {
   PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("lib.deno_fetch.d.ts")
 }