[CLN]: Clean up small nits (#1489)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
	 - Removed redeclaration of EmbeddingFunction and DataLoader
	 - Removed unused imports
	 - Added doc strings
	 - Removed redeclaration of typevars L/D

## Test plan
*How are these changes tested?*

- [x] Tests pass locally with `pytest` for python

## Documentation Changes
N/A

chromadb/api/__init__.py

@@ -98,6 +98,7 @@ def create_collection(
             embedding_function: Optional function to use to embed documents.
                                 Uses the default embedding function if not provided.
             get_or_create: If True, return the existing collection if it exists.
+            data_loader: Optional function to use to load records (documents, images, etc.)
 
         Returns:
             Collection: The newly created collection.
@@ -129,9 +130,11 @@ def get_collection(
     ) -> Collection:
         """Get a collection with the given name.
         Args:
+            id: The UUID of the collection to get. Id and Name are simultaneously used for lookup if provided.
             name: The name of the collection to get
             embedding_function: Optional function to use to embed documents.
                                 Uses the default embedding function if not provided.
+            data_loader: Optional function to use to load records (documents, images, etc.)
 
         Returns:
             Collection: The collection
@@ -165,6 +168,7 @@ def get_or_create_collection(
             provided and not None. If the collection does not exist, the
             new collection will be created with the provided metadata.
             embedding_function: Optional function to use to embed documents
+            data_loader: Optional function to use to load records (documents, images, etc.)
 
         Returns:
             The collection

chromadb/api/types.py

@@ -1,4 +1,4 @@
-from typing import Optional, Sequence, Union, TypeVar, List, Dict, Any, Tuple, cast
+from typing import Optional, Union, TypeVar, List, Dict, Any, Tuple, cast
 from numpy.typing import NDArray
 import numpy as np
 from typing_extensions import Literal, TypedDict, Protocol
@@ -145,20 +145,10 @@ def maybe_cast_one_to_many_image(target: OneOrMany[Image]) -> Images:
 D = TypeVar("D", bound=Embeddable, contravariant=True)
 
 
-class EmbeddingFunction(Protocol[D]):
-    def __call__(self, input: D) -> Embeddings:
-        ...
-
-
 Loadable = List[Optional[Image]]
 L = TypeVar("L", covariant=True, bound=Loadable)
 
 
-class DataLoader(Protocol[L]):
-    def __call__(self, uris: Sequence[Optional[URI]]) -> L:
-        ...
-
-
 class GetResult(TypedDict):
     ids: List[ID]
     embeddings: Optional[List[Embedding]]
@@ -189,10 +179,6 @@ class IndexMetadata(TypedDict):
     time_created: float
 
 
-Embeddable = Union[Documents, Images]
-D = TypeVar("D", bound=Embeddable, contravariant=True)
-
-
 class EmbeddingFunction(Protocol[D]):
     def __call__(self, input: D) -> Embeddings:
         ...
@@ -214,9 +200,6 @@ def validate_embedding_function(
         )
 
 
-L = TypeVar("L", covariant=True)
-
-
 class DataLoader(Protocol[L]):
     def __call__(self, uris: URIs) -> L:
         ...

chromadb/server/fastapi/__init__.py

@@ -7,8 +7,6 @@
 from fastapi.routing import APIRoute
 from fastapi import HTTPException, status
 from uuid import UUID
-
-import chromadb
 from chromadb.api.models.Collection import Collection
 from chromadb.api.types import GetResult, QueryResult
 from chromadb.auth import (
@@ -30,7 +28,6 @@
     attr_from_resource_object,
 )
 from chromadb.config import DEFAULT_DATABASE, DEFAULT_TENANT, Settings, System
-import chromadb.server
 import chromadb.api
 from chromadb.api import ServerAPI
 from chromadb.errors import (