[AIRFLOW-XXX] Remove unused coveralls token

(cherry picked from commit b7e0d09a9ccc62dada5e29d05b9f668df3fb3942)
Signed-off-by: Bolke de Bruin <bolke@xs4all.nl>
(cherry picked from commit 579068a8877d7be90c6fcba8ae44691e4ba2b658)
Signed-off-by: Bolke de Bruin <bolke@xs4all.nl>
(cherry picked from commit 17970c57e9fd377f8a0000e32dd69aa7cb9fa2f2)
Signed-off-by: Bolke de Bruin <bolke@xs4all.nl>
diff --git a/tox.ini b/tox.ini
index 4187b59..f9552de 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,7 +29,6 @@
   py27: python2.7
   py34: python3.4
 setenv =
-  COVERALLS_REPO_TOKEN=ic8IH7CrUrtweVbmY3VZQ7ncEGe1XJA5E
   cdh: HADOOP_DISTRO=cdh
   cdh: HADOOP_HOME=/tmp/hadoop-cdh
   cdh: HADOOP_OPTS=-D/tmp/krb5.conf