Remove unused imports

modules/api/api.py

 from modules.api.processing import StableDiffusionProcessingAPI
 from modules.processing import StableDiffusionProcessingTxt2Img, process_images
 from modules.sd_samplers import all_samplers
-from modules.extras import run_pnginfo
 import modules.shared as shared
 import uvicorn
-from fastapi import Body, APIRouter, HTTPException
-from fastapi.responses import JSONResponse
+from fastapi import APIRouter, HTTPException
 from pydantic import BaseModel, Field, Json
 import json
 import io
@@ -18,7 +16,6 @@ class TextToImageResponse(BaseModel):
     parameters: Json
     info: Json
 
-
 class Api:
     def __init__(self, app, queue_lock):
         self.router = APIRouter()