Remove non-top-level dependencies from requirements.txt

Makefile

@@ -2,16 +2,14 @@ PYTHON = python3
 FLASK = flask
 SQLITE = sqlite3
 
-default: install
+default: venv
 
-test::
+test:: venv
 	test/all.sh
 
-install:: venv
-	. ./venv/bin/activate && pip3 install -r requirements.txt
-
 venv:
 	$(PYTHON) -m venv $@
+	. ./venv/bin/activate && pip3 install -r requirements.txt
 
 forum.db:
 	$(SQLITE) $@ < schema.txt

requirements.txt

@@ -1,14 +1,4 @@
 argon2-cffi==21.3.0
-argon2-cffi-bindings==21.2.0
-cffi==1.15.1
-click==8.1.3
 Flask==2.2.2
 gunicorn==20.1.0
-importlib-metadata==5.0.0
-itsdangerous==2.1.2
-Jinja2==3.1.2
-MarkupSafe==2.1.1
 passlib==1.7.4
-pycparser==2.21
-Werkzeug==2.2.2
-zipp==3.8.1