Remove outdated comment about update_submodule

Although its origins were in bootstrap.py, that code in bootstrap.py
no longer exists since it was removed.

1 files changed, 0 insertions, 1 deletions

diff --git a/src/bootstrap/src/lib.rs b/src/bootstrap/src/lib.rs
index e8f412d785d..0ce50ccaf3f 100644
--- a/src/bootstrap/src/lib.rs
+++ b/src/bootstrap/src/lib.rs
@@ -470,7 +470,6 @@ impl Build {
         build
     }
 
-    // modified from `check_submodule` and `update_submodule` in bootstrap.py
     /// Given a path to the directory of a submodule, update it.
     ///
     /// `relative_path` should be relative to the root of the git repository, not an absolute path.