Introduced in
https://gitlab.com/gitlab-org/gitlab-ce/commit/adc59353fa48c5e433b80efc1698c0b12e121968#852fdbe4145be33eca58d30d8c2f4a6623ef8602_30_30

Only usage removed in
https://gitlab.com/gitlab-org/gitlab-ce/commit/de9e559d4495560095adfa03ea6489ea51f6f2f4#e22df3c6b3631af90cde45bbb974ddce72aefab7_21_21