Encoding ignored

[mcp292]

Describe the bug
The encoding argument seems to be ignored.

To Reproduce

1. Save this image as file.png:
   

2. Run:

import textract


print(textract.process("file.png"), "\n")
print(textract.process("file.png", encoding="ascii"), "\n")
print(textract.process("file.png", encoding="nonexistent encoding"), "\n")

Expected behavior
I would expect the output of the above to differ. I would expect ascii to not be output as a byte string. I would expect nonexistent encoding to error or warn and ignore.

Desktop (please complete the following information):

• OS: Fedora 40
• Textract version: 1.6.5
• Python version: 3.12.4
• Virtual environment: no

Additional context
Haven't tested commandline.