Remove bazel-genfiles from .gitignore

Change-Id: Id37bb0afe2542babe1d3177b04ff6d7e8054fb9e

.gitignore

diff --git a/.gitignore b/.gitignore
index 0f6afe5..30da2c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,6 @@
 /.settings/
 /.primary_build_tool
 /bazel-bin
-/bazel-genfiles
 /bazel-out
 /bazel-reviewers
 /bazel-testlogs