Updating constraints. Build id:535762336

This update in constraints is automatically committed by the CI 'constraints-push' step based on
HEAD of 'refs/heads/v2-0-test' in 'apache/airflow'
with commit sha a89b7eab6ef46cb0fc48847bf246b5a20226ac52.

All tests passed in this build so we determined we can push the updated constraints.

See https://github.com/apache/airflow/blob/master/README.md#installing-from-pypi for details.
diff --git a/constraints-3.6.txt b/constraints-3.6.txt
index 8935fac..998dc03 100644
--- a/constraints-3.6.txt
+++ b/constraints-3.6.txt
@@ -141,7 +141,6 @@
 flower==0.9.5
 freezegun==1.0.0
 fsspec==0.8.4
-future-fstrings==1.2.0
 future==0.18.2
 gcsfs==0.7.1
 gevent==20.9.0
diff --git a/constraints-3.7.txt b/constraints-3.7.txt
index 4d5e054..819f035 100644
--- a/constraints-3.7.txt
+++ b/constraints-3.7.txt
@@ -139,7 +139,6 @@
 flower==0.9.5
 freezegun==1.0.0
 fsspec==0.8.4
-future-fstrings==1.2.0
 future==0.18.2
 gcsfs==0.7.1
 gevent==20.9.0
diff --git a/constraints-3.8.txt b/constraints-3.8.txt
index 4d5e054..819f035 100644
--- a/constraints-3.8.txt
+++ b/constraints-3.8.txt
@@ -139,7 +139,6 @@
 flower==0.9.5
 freezegun==1.0.0
 fsspec==0.8.4
-future-fstrings==1.2.0
 future==0.18.2
 gcsfs==0.7.1
 gevent==20.9.0