TBR: js.core: Remove .v23 from all .gitignore files.

MultiPart: 9/25

Change-Id: I7247e199819d396a995ba96fc0bdef4c9b7e87c5
diff --git a/.gitignore b/.gitignore
index 58d412c..bc82409 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,4 @@
 /.jiri
-#TODO(nlacasse): Get rid of .v23 below once v23->jiri transition is complete.
 coverage
 dist
 docs
@@ -17,6 +16,3 @@
 xunit.xml
 tmp
 .idea
-
-# Vanadium
-/.v23