fix jpeg handling

[vladmandic]

fix infamous KeyError: '.jpg' (not fully fixed in #5838 and tons of bug reports to quote)

this is a non-intrusive pr and does not touch exif handling which will be addressed in separate pr

[aliencaocao]

With gradio 3.15.0 this should be fully fixed already, no need for any workaround in this repo

[vladmandic]

its fixed in underlying pillow and gradio 3.15 uses that correctly, but gradio that does not enforce pillow version.
(there were plenty of other apps impacted (not just gradio))

this pr also removes unnecessary imports and performs pillow init which is recommended to do once since we cant be sure which import messed up what (that was the original root cause)

from pillow docs for Image.init():

    Explicitly initializes the Python Imaging Library. This function
    loads all available file format drivers.

[aliencaocao]

No, gradio 3.15 includes a workaround that works on any version of pillow. In fact, I made that workaround so I know this well. See gradio-app/gradio#2846

[aliencaocao]

Also, Pillow 9.4.0 also includes a fix: python-pillow/Pillow#6811
So if you want to pin pillow version, you should use 9.4.0

[vladmandic]

yes, gradio 3.15 has a workaround for a root cause in pillow - and thanks for that!

also, pillow 9.4.0 does exactly what i did here - explicitly call init() :)

i can either modify pr to upgrade to pillow 9.4.0 and remove that line or leave it as-is.
i'm ok with either option, you pick.

[aliencaocao]

I think you should upgrade to 9.4.0