Drop x86-TF-06

Signed-off-by: Benjamin Copeland <ben.copeland@linaro.org>
Change-Id: Icb6d6d8661e00b4a39409384ec0db57a3d629262
diff --git a/ci-dockerslaves-cleanup.yaml b/ci-dockerslaves-cleanup.yaml
index ae90a38..edffffa 100644
--- a/ci-dockerslaves-cleanup.yaml
+++ b/ci-dockerslaves-cleanup.yaml
@@ -35,7 +35,6 @@
                 - x86_64-TF-03
                 - x86_64-TF-04
                 - x86_64-TF-05
-                - x86-TF-06
     execution-strategy:
         sequential: false
     wrappers: