Remove SCHEDULED_DEPS which is no longer used anywhere since 2.0.0 (#…

…37140)

* Remove SCHEDULED_DEPS which is no longer used anywhere since 2.0.0

* Fixup

airflow/ti_deps/dependencies_deps.py

@@ -20,7 +20,6 @@
     BACKFILL_QUEUEABLE_STATES,
     QUEUEABLE_STATES,
     RUNNABLE_STATES,
-    SCHEDULEABLE_STATES,
 )
 from airflow.ti_deps.deps.dag_ti_slots_available_dep import DagTISlotsAvailableDep
 from airflow.ti_deps.deps.dag_unpaused_dep import DagUnpausedDep
@@ -33,14 +32,6 @@
 from airflow.ti_deps.deps.task_not_running_dep import TaskNotRunningDep
 from airflow.ti_deps.deps.valid_state_dep import ValidStateDep
 
-# Context to get the dependencies that need to be met in order for a task instance to be
-# set to 'scheduled' state.
-SCHEDULED_DEPS = {
-    RunnableExecDateDep(),
-    ValidStateDep(SCHEDULEABLE_STATES),
-    TaskNotRunningDep(),
-}
-
 # Dependencies that if met, task instance should be re-queued.
 REQUEUEABLE_DEPS = {
     DagTISlotsAvailableDep(),