TBR: physical-lock: Remove .v23 from all .gitignore files.

MultiPart: 18/25

Change-Id: I5768948a6302aa83badb8515f3249e4f9e7a16c3
diff --git a/.gitignore b/.gitignore
index 6dcf6b1..41b80e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,3 @@
 /.jiri
-#TODO(nlacasse): Get rid of .v23 below once v23->jiri transition is complete.
-/.v23
 /go/bin/
 /go/pkg/