Remove android pullimage command

Instead, run `images pull android`.

CHANGELOG.md

@@ -4,6 +4,7 @@ Note: Breaking changes between versions are indicated by "💥".
 
 ## Unreleased
 
+- 💥[Improvement] Remove `tutor android pullimage` command. Instead, run `tutor images pull android`.
 - [Bugfix] Fix `config save` on Windows.
 - [Bugfix] Fix platform checking in user ID function
 

tutor/commands/android.py

@@ -24,13 +24,6 @@ def build(context, mode):
     )
 
 
-@click.command(help="Pull the docker image")
-@click.pass_obj
-def pullimage(context):
-    config = tutor_config.load(context.root)
-    utils.docker("pull", config["DOCKER_IMAGE_ANDROID"])
-
-
 def build_command(config, target):
     gradle_target = {
         "debug": "assembleProdDebuggable",
@@ -58,4 +51,3 @@ def docker_run(root, command):
 
 
 android.add_command(build)
-android.add_command(pullimage)