Remove the weak argument from Signal.disconnect()

[browniebroke]

Fixes #120

[codecov]

Codecov Report

Merging #208 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #208   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        24    +1     
  Lines          698       740   +42     
=========================================
+ Hits           698       740   +42     

Impacted Files	Coverage Δ
django_codemod/visitors/__init__.py	100.00% <100.00%> (ø)
django_codemod/visitors/signals.py	100.00% <100.00%> (ø)

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[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 0.05%.

Quality metrics	Before	After	Change
Complexity	0.05 ⭐	0.05 ⭐	0.00
Method Length	39.30 ⭐	39.55 ⭐	0.25 👎
Working memory	9.95 😞	10.10 😞	0.15 👎
Quality	84.37% ⭐	84.32% ⭐	-0.05% 👎

Other metrics	Before	After	Change
Lines	329	333	4

Changed files	Quality Before	Quality After	Quality Change
django_codemod/visitors/init.py	56.20% 🙂	55.65% 🙂	-0.55% 👎
tests/test_cli.py	85.85% ⭐	85.83% ⭐	-0.02% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
tests/test_cli.py	test_deprecated_in_mapping	0	69 🙂	40 ⛔	57.29% 🙂	Extract out complex expressions
tests/test_cli.py	test_removed_in_mapping	0	61 ⭐	38 ⛔	58.59% 🙂	Extract out complex expressions
tests/test_cli.py	test_basic_arguments	1 ⭐	94 🙂	11 😞	66.94% 🙂	Extract out complex expressions
tests/test_cli.py	test_get_short_description	0	32 ⭐	11 😞	77.52% ⭐	Extract out complex expressions

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