Revert "restore python 3.7 support"

This reverts commit dbd54a4.

We no longer need this now that rtd.org is using 3.11.

Author: dhellmann

.github/workflows/test.yml

@@ -16,7 +16,6 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - 3.7
           - 3.8
           - 3.9
           - "3.10"

pyproject.toml

@@ -13,7 +13,6 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
@@ -28,7 +27,7 @@ dynamic = ["version"]
 keywords = ["virtualenv"]
 license = {text = "MIT"}
 readme = "README.txt"
-requires-python = ">=3.7"
+requires-python = ">=3.8"
 
 dependencies = [
     "virtualenv",