Revert "Handle Commit "show suppressed diff" link with a doc-ready event handler."

This reverts commit ef1598b4af.

app/views/commits/_text_file.html.haml

@@ -1,6 +1,6 @@
 - too_big = max_lines = diff.diff.lines.count > 1000
 - if too_big
-  %a.supp_diff_link Diff suppressed. Click to show
+  = link_to_function "Diff suppressed. Click to show", "showDiff(this)", :class => "supp_diff_link"
 
 %table{:class => "#{'hide' if too_big}"}
   - each_diff_line(diff.diff.lines.to_a, index) do |line, type, line_code, line_new, line_old|