Remove dev requirements from setup.cfg

This isn't really a needed functionality given our requirements files.
Primarily though, pypi doesn't like titanoboa not being on pypi:

    Invalid value for requires_dist.
    Error: Can't have direct dependency: "titanoboa @ [...]

setup.cfg

@@ -82,19 +82,6 @@ install_requires =
 	python-dotenv >= 0.19.2
 	tenacity >= 8.1.0
 
-[options.extras_require]
-dev = 
-	black==22.6.0
-	flake8==5.0.4
-	pylint==2.14.5
-	astroid==2.11.7
-	scriv==0.16.0
-	bump2version==1.0.1
-	pytest==7.1.3
-	hypothesis[numpy,pandas]==6.54.6
-	titanoboa @ git+https://github.com/vyperlang/titanoboa@ad59fd9a9dc72057dfffdbb6db455ae0ff0f96e8
-	py-evm==0.6.0a1
-
 [options.packages.find]
 exclude = 
 	.github