fix: remove unused EXPERIMENT_IDS/experiments import from Task.ts

Addresses review feedback: removes the unused imports from
src/core/task/Task.ts that were left over after removing the
MULTI_FILE_APPLY_DIFF experiment routing code.

Author: hannesrudolph

src/core/task/Task.ts

@@ -70,7 +70,6 @@ import { getApiMetrics, hasTokenUsageChanged, hasToolUsageChanged } from "../../
 import { ClineAskResponse } from "../../shared/WebviewMessage"
 import { defaultModeSlug, getModeBySlug, getGroupName } from "../../shared/modes"
 import { DiffStrategy, type ToolUse, type ToolParamName, toolParamNames } from "../../shared/tools"
-import { EXPERIMENT_IDS, experiments } from "../../shared/experiments"
 import { getModelMaxOutputTokens } from "../../shared/api"
 
 // services