Clean up variables in Makefile

The variables that are defined in the Makefile
are by default set to false. A contributor
needs to always overwrite them via CLI, it
does not matter if they are present in the
Makefile or not.

Current behavior has a limitation that if
someone does not want to always overwrite
them via CLI and they export those variables
in a terminal session - it would have no effect
effect since the values for those variables are
hard-coded in the Makefile.

Signed-off-by: Michal Šoltis <[email protected]>

Makefile

@@ -1,9 +1,4 @@
 PYTHON_VERSION_VENV ?= python3
-TOX_ENVLIST ?= py3
-TOX_ARGS ?=
-GENERATE_TEST_DATA = false
-TEST_LOCAL_PYPISERVER = false
-TEST_LOCAL_DNF_SERVER = false
 
 .PHONY: clean pip-compile
 all: venv
@@ -22,13 +17,10 @@ test: venv
 	venv/bin/tox
 
 test-unit: venv
-	venv/bin/tox -e $(TOX_ENVLIST) -- $(TOX_ARGS)
+	venv/bin/tox -e py3
 
 test-integration: venv
-	CACHI2_GENERATE_TEST_DATA=$(GENERATE_TEST_DATA) \
-	CACHI2_TEST_LOCAL_PYPISERVER=$(TEST_LOCAL_PYPISERVER) \
-		venv/bin/tox -e integration -- $(TOX_ARGS)
-	CACHI2_TEST_LOCAL_DNF_SERVER=$(TEST_LOCAL_DNF_SERVER)
+	venv/bin/tox -e integration
 
 mock-unittest-data:
 	hack/mock-unittest-data/gomod.sh