Remove duplicate indentWithTabs pref

Change-Id: I4ad2e744fd32235e82373c8053a1819ca8b0d91e

gr-editor/gr-editor.js

diff --git a/gr-editor/gr-editor.js b/gr-editor/gr-editor.js
index e608ab3..eeff6bf 100644
--- a/gr-editor/gr-editor.js
+++ b/gr-editor/gr-editor.js
@@ -69,7 +69,6 @@
         params.lineLength = prefs.line_length;
         params.lineNumbers = !prefs.hide_line_numbers;
         params.lineWrapping = prefs.line_wrapping;
-        params.indentWithTabs = prefs.indent_with_tabs;
         params.matchBrackets = prefs.match_brackets;
         // TODO: Add support for a new commit msg MIME type
         // Support for this is somewhere in gerrit's codebase