Remove redudant tox.ini entry

Author: soerenreichardt

tox.ini

@@ -8,7 +8,6 @@ envlist =
 	py311-pandas{1,2}-pyarrow{10,11,12}-main-{standard,encrypted},
 
 	py37-neo4j{4,5}-pullrequest-{standard,encrypted},
-	py37-pyarrow{4,5,6,7,8,9,10,11,12}-pullrequest-{standard,encrypted},
 	py{38,39}-neo4j{4,5}-pullrequest-{standard,encrypted},
 	py{310,311}-pullrequest-{standard,encrypted},