remove unused snapshot retention field

frigate/config/camera/snapshots.py

@@ -3,7 +3,6 @@ from typing import Optional
 from pydantic import Field
 
 from ..base import FrigateBaseModel
-from .record import RetainModeEnum
 
 __all__ = ["SnapshotsConfig", "RetainConfig"]
 
@@ -14,11 +13,6 @@ class RetainConfig(FrigateBaseModel):
         title="Default retention",
         description="Default number of days to retain snapshots.",
     )
-    mode: RetainModeEnum = Field(
-        default=RetainModeEnum.motion,
-        title="Retention mode",
-        description="Mode for retention: all (save all segments), motion (save segments with motion), or active_objects (save segments with active objects).",
-    )
     objects: dict[str, float] = Field(
         default_factory=dict,
         title="Object retention",

web/src/components/config-form/section-configs/snapshots.ts

@@ -36,11 +36,6 @@ const snapshots: SectionConfigOverrides = {
           suppressMultiSchema: true,
         },
       },
-      "retain.mode": {
-        "ui:options": {
-          enumI18nPrefix: "retainMode",
-        },
-      },
     },
   },
   global: {