roll: recipes_version.txt bazel_roll: Remove unused variable

Original-Reviewed-on: https://pigweed-review.googlesource.com/c/infra/recipes/+/305191
Original-Revision: f581fbd10e52cf7196efc272600fc5f121b77854
GitOrigin-RevId: a79650a67a2f4d4ca07e693c27a9ebea98bafb01
Change-Id: I0312f326f769122b54e49bdbf1a8cbab7024a5ff

recipes_version.txt

diff --git a/recipes_version.txt b/recipes_version.txt
index 0d79616..90c0d43 100644
--- a/recipes_version.txt
+++ b/recipes_version.txt
@@ -1 +1 @@
-0a98cb4f2ebd58e436698c292059a610d8bbb2c8
+f581fbd10e52cf7196efc272600fc5f121b77854