remove duplicate dependency (#1849)

Co-authored-by: Carson Sievert <[email protected]>

Author: dotlambda

pyproject.toml

@@ -32,7 +32,6 @@ dependencies = [
     "uvicorn>=0.16.0;platform_system!='Emscripten'",
     "starlette",
     "websockets>=13.0",
-    "python-multipart",
     "htmltools>=0.6.0",
     "click>=8.1.4;platform_system!='Emscripten'",
     "markdown-it-py>=1.1.0",