Remove redundant unit test commands

Makefile

@@ -16,7 +16,6 @@ help:
 	@echo " make build - build the snap"
 	@echo " make lint - run lint checkers"
 	@echo " make reformat - run lint tools to auto format code"
-	@echo " make unittests - run the tests defined in the unittest subdirectory"
 	@echo " make functional - run the tests defined in the functional subdirectory"
 	@echo " make test - run lint, proof, unittests and functional targets"
 	@echo ""
@@ -25,10 +24,6 @@ lint:
 	@echo "Running lint checks"
 	@tox -e lint
 
-unittests:
-	@echo "Running unit tests"
-	@tox -e unit -- ${UNIT_ARGS}
-
 test: lint unittests functional
 	@echo "Tests completed for the snap."
 
@@ -52,4 +47,4 @@ functional: build
 	@TEST_SNAP=${SNAP_FILE} tox -e func -- ${FUNC_ARGS}
 
 # The targets below don't depend on a file
-.PHONY: help clean build lint reformat unittests functional test
+.PHONY: help clean build lint reformat unittests functional test

tox.ini

@@ -36,12 +36,10 @@ commands =
     black .
     isort .
 
-[testenv:unit]
-
 [testenv:func]
 deps =
     pytest
 passenv =
     TEST_*
 commands =
-    pytest {toxinidir}/tests/functional {posargs:-v}
+    pytest {toxinidir}/tests/functional {posargs:-v}