patch 8.2.0853: ml_delete() often called with FALSE argument

Problem:    ml_delete() often called with FALSE argument.
Solution:   Use ml_delete_flags(x, ML_DEL_MESSAGE) when argument is TRUE.
diff --git a/src/buffer.c b/src/buffer.c
index a657e72..df92ecd 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -103,13 +103,13 @@
     {
 	// Delete the binary lines.
 	while (--line_count >= 0)
-	    ml_delete((linenr_T)1, FALSE);
+	    ml_delete((linenr_T)1);
     }
     else
     {
 	// Delete the converted lines.
 	while (curbuf->b_ml.ml_line_count > line_count)
-	    ml_delete(line_count, FALSE);
+	    ml_delete(line_count);
     }
     // Put the cursor on the first line.
     curwin->w_cursor.lnum = 1;