Use euler scheduler

scheduler/scheduler_config.json

@@ -1,24 +1,18 @@
 {
-  "_class_name": "FlaxDPMSolverMultistepScheduler",
+  "_class_name": "EulerDiscreteScheduler",
   "_diffusers_version": "0.19.0.dev0",
-  "algorithm_type": "dpmsolver++",
   "beta_end": 0.012,
   "beta_schedule": "scaled_linear",
   "beta_start": 0.00085,
   "clip_sample": false,
-  "dynamic_thresholding_ratio": 0.995,
   "interpolation_type": "linear",
-  "lower_order_final": true,
   "num_train_timesteps": 1000,
   "prediction_type": "epsilon",
   "sample_max_value": 1.0,
   "set_alpha_to_one": false,
   "skip_prk_steps": true,
-  "solver_order": 2,
-  "solver_type": "midpoint",
   "steps_offset": 1,
-  "thresholding": false,
   "timestep_spacing": "leading",
   "trained_betas": null,
   "use_karras_sigmas": false
-}
+}