fix: remove foobar functions which was only used to test if sphinx works

Refs: OPS-69

senju/haiku.py

@@ -10,13 +10,6 @@ AI_BASE_URL: str = "http://ollama:11434/api"
 AI_GEN_ENDPOINT: str = "/generate"
 
 
-def foobar():
-    """WE KNOW"""
-    a = 3
-    b = 3
-    return a + b
-
-
 @dataclass
 class Haiku:
     lines: list[str]

senju/main.py

@@ -15,13 +15,6 @@ app = Flask(__name__)
 store = StoreManager(Path("/tmp/store.db"))
 
 
-def foobar():
-    """WE KNOW"""
-    a = 3
-    b = 3
-    return a + b
-
-
 @app.route("/")
 def index_view():
     return render_template("index.html", title="Senju")

senju/store_manager.py

@@ -12,13 +12,6 @@ from senju.haiku import Haiku
 DEFAULT_DB_PATH: Path = Path("/var/lib/senju.json")
 
 
-def foobar():
-    """WE KNOW"""
-    a = 3
-    b = 3
-    return a + b
-
-
 class StoreManager:
     __slots__ = "_db", "logger"
     _db: TinyDB