fix: bump gradio sdk_version to 4.44.1 to resolve api_info TypeError

gradio 4.36.0 crashes on every request to /api/info with
TypeError: argument of type 'bool' is not iterable
because gradio_client's get_type() doesn't handle additionalProperties: true.
Upgrading to 4.44.1 fixes this. Also remove duplicate gradio pin from
requirements.txt since HF manages it via sdk_version.

README.md

@@ -4,7 +4,7 @@ emoji: 🎙️
 colorFrom: blue
 colorTo: green
 sdk: gradio
-sdk_version: 4.36.0
+sdk_version: 4.44.1
 app_file: app.py
 pinned: false
 python_version: 3.10.13

requirements.txt

@@ -1,5 +1,4 @@
 numpy>=1.26.4,<2.0.0
-gradio>=4.0.0
 yt-dlp
 requests
 pytube