Rollback some test changes now that Python persistent handles registration...

Rollback some test changes now that Python persistent handles registration during __setstate__ the same way C persistent does.

src/ZEO/tests/InvalidationTests.py

@@ -343,7 +343,6 @@ class InvalidationTests:
         self._check_tree(cn, tree)
         self._check_threads(tree, t1, t2)
 
-        transaction.abort()
         cn.close()
         db1.close()
         db2.close()
@@ -375,7 +374,6 @@ class InvalidationTests:
         self._check_tree(cn, tree)
         self._check_threads(tree, t1, t2)
 
-        transaction.abort()
         cn.close()
         db1.close()
         db2.close()
@@ -405,7 +403,6 @@ class InvalidationTests:
         self._check_tree(cn, tree)
         self._check_threads(tree, *threads)
 
-        transaction.abort()
         cn.close()
         _ = [db.close() for db in dbs]
 
@@ -430,7 +427,6 @@ class InvalidationTests:
         self._check_tree(cn, tree)
         self._check_threads(tree, t1, t2)
 
-        transaction.abort()
         cn.close()
         db1.close()
 
@@ -465,7 +461,6 @@ class InvalidationTests:
         self._check_tree(cn, tree)
         self._check_threads(tree, t1, t2, t3)
 
-        transaction.abort()
         cn.close()
         db1.close()
         db2.close()