remove version

.circleci/config.yml

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 2bfda2a..a5d7e20 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -140,8 +140,7 @@
       - run:
           name: install docker
           command: apt-get update -q && apt-get install -q -y docker.io
-      - setup_remote_docker:
-          version: 20.10.17
+      - setup_remote_docker
       # Build and test the tip-of-tree build of EMSDK
       - run:
           name: build
@@ -157,8 +156,7 @@
       - run:
           name: install docker
           command: apt-get update -q && apt-get install -q -y docker.io
-      - setup_remote_docker:
-          version: 20.10.17
+      - setup_remote_docker
       - run:
           name: build
           command: make -C ./docker version=${CIRCLE_TAG} build