Revert "Edit radical groups in the test database, to make unit test pass."

Because the change may alter estimates of radical thermo of OJ nodes
that don't descend further to either HOJ or COJ or OOJ,
and because the unit test is still fragile (to this tree being exactly
the way it is) I think I have thought of a better fix, which I'll do next.

This reverts commit b4b4f31.

Author: rwest

test/rmgpy/test_data/testing_database/thermo/groups/radical.py

@@ -6047,17 +6047,10 @@
     group="""
 1 * O u1
 """,
-    thermo="RJ",
-    shortDesc="""NOT RIGHT VALUE - EDITED FOR UNIT TESTING""",
-    longDesc="""
-There's a unit test test_remove_group that wants to see what happens
-if you remove a group that something else is referencing or pointing to.
-So this group (OJ) points to RJ so that when the test deletes
-RJ (which was pointing to CJ) we can test that this group would then
-point directly to CJ.
-Since this file is just use for testing purposes, we can use if for that test.
-In the real database OJ points to COJ, not RJ.
-https://github.com/ReactionMechanismGenerator/RMG-database/blob/0623bd4f891e7c9e6e669ac0efd5d99a79403429/input/thermo/groups/radical.py#L50284
+    thermo="COJ",
+    shortDesc="""""",
+    longDesc="""
+
 """,
 )