Remove constraints/extra requirements due to Python 3.7/3.8

Author: johannaengland

constraints.txt

@@ -1,3 +0,0 @@
-# ciscoconfparse 1.8 has a bug that prevents it from being imported on Python 3.7,
-# even though it claims compatibility with 3.7.
-ciscoconfparse<1.8.0 ; python_version < '3.8'

pyproject.toml

@@ -16,10 +16,6 @@ classifiers = [
     "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
 ]
 dynamic = ["version"]
-dependencies = [
-    "importlib_metadata; python_version < '3.8'",
-    "importlib_resources; python_version < '3.9'",
-]
 
 
 [project.urls]

requirements/base.txt

@@ -6,7 +6,7 @@ psycopg2==2.9.9  # requires libpq to build
 IPy==1.01
 pyaml
 
-twisted~=23.8.0  # last version that still supports Python 3.7
+twisted>=23.8.0
 
 networkx==2.6.3
 Pillow>3.3.2
@@ -35,7 +35,4 @@ libsass==0.15.1
 
 napalm==3.4.1
 
-backports.zoneinfo ; python_version < '3.9'
-importlib_metadata ; python_version < '3.8'
-importlib_resources ; python_version < '3.9'
 git+https://github.com/Uninett/[email protected]#egg=drf-oidc-auth