vi: remove redundant assignment

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/editors/vi.c b/editors/vi.c
index a4b9587..23a44d5 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -3244,7 +3244,6 @@
 								TEST_UNDO2 ? ALLOW_UNDO_CHAIN : ALLOW_UNDO);
 					found += bias;
 					ls += bias;
-					dot = ls;
 					//q += bias; - recalculated anyway
 				}
 #  if ENABLE_FEATURE_VI_REGEX_SEARCH