Remove bazel-genfiles from .gitignore

Change-Id: I44aa7364f711981d1e6a9b3b63067f4eec3c865b
diff --git a/.gitignore b/.gitignore
index 6b0bf05..dbd3157 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,6 @@
 /.settings/
 /.primary_build_tool
 /bazel-bin
-/bazel-genfiles
 /bazel-out
 /bazel-reviewers
 /bazel-testlogs