Remove drop index ACT_IDX_BYTEAR_DEPL from engine drop scripts

ACT_GE_BYTEARRAY is a common schema table, not an engine table. Having
its index drop in the engine drop script causes the drop to fail when
the common schema is dropped first (reverse order in drop-create),
which prevents the history drop from executing and leaves history
tables behind for subsequent schema creation.

Author: filiphr

modules/flowable-engine/src/main/resources/org/flowable/db/drop/flowable.oracle.drop.engine.sql

@@ -1,4 +1,3 @@
-drop index ACT_IDX_BYTEAR_DEPL;
 drop index ACT_IDX_EXE_PROCINST;
 drop index ACT_IDX_EXE_PARENT;
 drop index ACT_IDX_EXE_SUPER;