[docs] Clean up pipeline apis (#3905)

* start with stable diffusion

* fix

* finish stable diffusion pipelines

* fix path to pipeline output

* fix flax paths

* fix copies

* add up to score sde ve

* finish first pass of pipelines

* fix copies

* second review

* align doc titles

* more review fixes

* final review

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion_inpaint_legacy.py

@@ -223,10 +223,10 @@ class StableDiffusionInpaintPipelineLegacy(
     # Copied from diffusers.pipelines.stable_diffusion.pipeline_stable_diffusion.StableDiffusionPipeline.enable_model_cpu_offload
     def enable_model_cpu_offload(self, gpu_id=0):
         r"""
-        Offloads all models to CPU using accelerate, reducing memory usage with a low impact on performance. Compared
-        to `enable_sequential_cpu_offload`, this method moves one whole model at a time to the GPU when its `forward`
-        method is called, and the model remains in GPU until the next model runs. Memory savings are lower than with
-        `enable_sequential_cpu_offload`, but performance is much better due to the iterative execution of the `unet`.
+        Offload all models to CPU to reduce memory usage with a low impact on performance. Moves one whole model at a
+        time to the GPU when its `forward` method is called, and the model remains in GPU until the next model runs.
+        Memory savings are lower than using `enable_sequential_cpu_offload`, but performance is much better due to the
+        iterative execution of the `unet`.
         """
         if is_accelerate_available() and is_accelerate_version(">=", "0.17.0.dev0"):
             from accelerate import cpu_offload_with_hook