revert erroneous checkin to mi-support.exp

diff --git a/gdb/testsuite/lib/mi-support.exp b/gdb/testsuite/lib/mi-support.exp
index e24cf06c34c6bcb56110e0b0a934ae7788b31761..86a0fd6030b1b0bf4bc49c78bc64b105db7cf534 100644 (file)
--- a/gdb/testsuite/lib/mi-support.exp
+++ b/gdb/testsuite/lib/mi-support.exp
@@ -2264,9 +2264,6 @@ namespace eval ::varobj_tree {
       error "tree does not contain enough elements"
     }
 
-variable _root_idx
-      set _root_idx 0
-
     # Create root node and process the tree.
     array set root [list language $language]
     array set root [list obj_name "root"]