Remove bazel-genfiles from .gitignore

Change-Id: Ie1af96bde96dee129cceb9411be137240049009b
diff --git a/.gitignore b/.gitignore
index b6af1fb..7031893 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,7 +2,6 @@
 /.project
 /.settings
 /bazel-bin
-/bazel-genfiles
 /bazel-oauth
 /bazel-out
 /bazel-testlogs