Remove drone and tox

.drone.yml

@@ -1,9 +0,0 @@
-image: python:all
-env:
-  - POSTGRESQL_URI=postgresql://postgres@127.0.0.1:5432/
-  - MYSQL_URI=mysql://root@127.0.0.1:3306/
-script:
-  - pip install tox
-  - tox -e "{py27,py33,py34,py35}-{sqlite,postgresql}" --skip-missing-interpreters
-services:
-  - postgres

tox.ini

@@ -1,17 +0,0 @@
-[tox]
-envlist = {py27,py33,py34,py35}-{sqlite,postgresql,mysql},pypy-{sqlite,postgresql}
-
-[testenv]
-commands = {envpython} setup.py test
-deps =
-    {py27,py33,py34,py35}-postgresql: psycopg2 >= 2.5
-    pypy-postgresql: psycopg2cffi >= 2.5
-    mysql: MySQL-python
-setenv =
-    sqlite: TRYTOND_DATABASE_URI={env:SQLITE_URI:sqlite://}
-    postgresql: TRYTOND_DATABASE_URI={env:POSTGRESQL_URI:postgresql://}
-    mysql: TRYTOND_DATABASE_URI={env:MYSQL_URI:mysql://}
-    sqlite: DB_NAME={env:SQLITE_NAME::memory:}
-    postgresql: DB_NAME={env:POSTGRESQL_NAME:test}
-    mysql: DB_NAME={env:MYSQL_NAME:test}
-install_command = pip install --pre --find-links https://trydevpi.tryton.org/ {opts} {packages}