[chore]: Delete some unused classes

src/dstack/_internal/core/models/runs.py

@@ -234,17 +234,6 @@ def pretty_format(self, resources_only: bool = False):
         return res
 
 
-class Gateway(CoreModel):
-    gateway_name: Optional[str]
-    service_port: int
-    hostname: Optional[str]
-    public_port: int = 80
-    secure: bool = False
-
-    auth: bool = True
-    options: dict = {}
-
-
 class JobSSHKey(CoreModel):
     private: str
     public: str

src/dstack/_internal/server/services/services/autoscalers.py

@@ -3,25 +3,12 @@
 from abc import ABC, abstractmethod
 from typing import Optional
 
-from pydantic import BaseModel
-
 import dstack._internal.utils.common as common_utils
 from dstack._internal.core.models.configurations import DEFAULT_SCALING_WINDOW, ScalingSpec
 from dstack._internal.core.models.resources import Range
 from dstack._internal.proxy.gateway.schemas.stats import PerWindowStats
 
 
-class ReplicaInfo(BaseModel):
-    """
-    Attributes:
-        active (bool): starting/running/retrying or downscaled
-        timestamp (datetime.datetime): `submitted_at` for active, `last_processed_at` for inactive
-    """
-
-    active: bool
-    timestamp: datetime.datetime
-
-
 class BaseServiceScaler(ABC):
     @abstractmethod
     def get_desired_count(