giterr_set_str: remove `GITERR_OS` documentation The `giterr_set_str` does not actually honor `GITERR_OS`. Remove the documentation that claims that we do.
diff --git a/include/git2/errors.h b/include/git2/errors.h
index 1b528cf..3ecea34 100644
--- a/include/git2/errors.h
+++ b/include/git2/errors.h
@@ -126,11 +126,6 @@ GIT_EXTERN(void) giterr_clear(void);
* This error message is stored in thread-local storage and only applies
* to the particular thread that this libgit2 call is made from.
*
- * NOTE: Passing the `error_class` as GITERR_OS has a special behavior: we
- * attempt to append the system default error message for the last OS error
- * that occurred and then clear the last error. The specific implementation
- * of looking up and clearing this last OS error will vary by platform.
- *
* @param error_class One of the `git_error_t` enum above describing the
* general subsystem that is responsible for the error.
* @param string The formatted error message to keep