Duplicate autogen.sh entry in commoncode default ignores

[Daksha1611]

Description

src/commoncode/ignore.py lists the same key twice in the default ignores, on two byte-identical consecutive lines (204-205):

    "autogen.sh": "Default ignore: autotools artifact",
    "autogen.sh": "Default ignore: autotools artifact",

Nothing misbehaves here — the key and the value are identical, so the dict ends up the same either way. It is just a dead line, and filing it as a small cleanup rather than a bug.

How To Reproduce

$ grep -n '"autogen.sh"' src/commoncode/ignore.py
204:    "autogen.sh": "Default ignore: autotools artifact",
205:    "autogen.sh": "Default ignore: autotools artifact",

import ast, collections

src = open('src/commoncode/ignore.py').read()
for node in ast.walk(ast.parse(src)):
    if isinstance(node, ast.Dict):
        counts = collections.Counter(
            k.value for k in node.keys
            if isinstance(k, ast.Constant) and isinstance(k.value, str)
        )
        for key, n in counts.items():
            if n > 1:
                print(f'line {node.lineno}: duplicate key {key!r} x{n}')

line 185: duplicate key 'autogen.sh' x2

Suggested fix

Delete one of the two lines. PR attached.

System configuration

• What OS are you running on? Linux (x86_64)
• What version of scancode-toolkit was used? 33.0.0rc1, develop at 5ebebf2
• What installation method was used to install/run scancode? source checkout
• Python version: 3.x