- Removing unused .env file

diesel still requires this however the --database-url flag is there to alleviate this issue
+ make test now cleans up fake png images from the cwd
This is more for comfort reall

json-api/Makefile

@@ -9,6 +9,7 @@ run:
 
 test:
 	cd ../ && bash scripts/run-api-tests.sh
+	rm -f *.png
 
 clean:
 	cargo clean