cleanup: remove obsolete comments

These comments were made obsolete in c323a2d5fe
("Continued refactoring of history", 2025-11-09)

Closes #12041

src/env_universal_common.rs

@@ -407,7 +407,6 @@ fn load_from_file(
         file: &File,
         current_file_id: FileId,
     ) -> Option<PotentialUpdate<UniversalReadUpdate>> {
-        // Get the dev / inode.
         if current_file_id == self.last_read_file_id {
             FLOG!(uvar_file, "universal log sync elided based on fstat()");
             None

src/history/file.rs

@@ -121,7 +121,7 @@ pub struct RawHistoryFile {
 impl RawHistoryFile {
     /// Construct a history file contents from a [`File`] reference and its file id.
     pub fn create(history_file: &File, file_id: FileId) -> std::io::Result<Self> {
-        // Check that the file is seekable, and its size.
+        // Check the file size.
         let len: usize = match file_id.size.try_into() {
             Ok(len) => len,
             Err(err) => {