[Arch] Remove supports for Background Commands (#2803)

* depracting docker exec box

* remove doc exec from workflow and docs

* remove background commands

* Update tests/unit/test_sandbox.py

Co-authored-by: Engel Nyst <enyst@users.noreply.github.com>

* replace for-loop with assignment

* fix integration tests

* fix integration tests for shell script

* fix integration tests

* increase max iter to fix some monologue agent issue

* fix integration test again

* fix integration tests (seems related to run_user issue)

---------

Co-authored-by: Engel Nyst <enyst@users.noreply.github.com>

agenthub/dummy_agent/agent.py

@@ -31,7 +31,6 @@ from opendevin.llm.llm import LLM
 """
 FIXME: There are a few problems this surfaced
 * FileWrites seem to add an unintended newline at the end of the file
-* Why isn't the output of the background command split between two steps?
 * Browser not working
 """
 
@@ -39,8 +38,6 @@ ActionObs = TypedDict(
     'ActionObs', {'action': Action, 'observations': list[Observation]}
 )
 
-BACKGROUND_CMD = 'echo "This is in the background" && sleep .1 && echo "This too"'
-
 
 class DummyAgent(Agent):
     VERSION = '1.0'
@@ -94,26 +91,10 @@ class DummyAgent(Agent):
                     )
                 ],
             },
-            {
-                'action': CmdRunAction(command=BACKGROUND_CMD, background=True),
-                'observations': [
-                    CmdOutputObservation(
-                        'Background command started. To stop it, send a `kill` action with command_id 42',
-                        command_id=42,
-                        command=BACKGROUND_CMD,
-                    ),
-                    CmdOutputObservation(
-                        'This is in the background\nThis too\n',
-                        command_id=42,
-                        command=BACKGROUND_CMD,
-                    ),
-                ],
-            },
             {
                 'action': AgentRecallAction(query='who am I?'),
                 'observations': [
                     AgentRecallObservation('', memories=['I am a computer.']),
-                    # CmdOutputObservation('This too\n', command_id=42, command=BACKGROUND_CMD),
                 ],
             },
             {