I can customise the buttons that appear in each row of TinyMCE and even remove the Table controls using the code below but the third row still appears with just separators in it. Is there any way to remove these separators and remove this 3rd row completely?

HtmlEditorConfig::get('cms')->setOption('theme_advanced_blockformats', 'p,h1,h2,h3');
HtmlEditorConfig::get('cms')->setOption('theme_advanced_disable', 'styleselect,cut,copy,paste,pasteword,undo,redo,selectall,visualaid,separator,Separator,|');
HtmlEditorConfig::get('cms')->setButtonsForLine(3);
HtmlEditorConfig::get('cms')->disablePlugins('table');

This results in:

I would love to get rid of that last row!
(using CMS and Framework 3.5.2)

HtmlEditorConfig::get('cms')->setButtonsForLine(3, '');

Thanks Devlin, but I already tried that (just tried again to confirm) it makes no difference - I still have that third row with separators in it.
I also tried ->setButtonsForLine(3, array()); but no joy
Any other ideas?

I solved this by adding the following CSS to my cms.css file in mysite/extracss folder

 .mceToolbarRow3 { display: none;} 

It's a bit of a hack, but it works.

If anyone is interested here are the other items I've got in this extra css file that I find useful:

/* Hide ErrorPages from CMS */
li.class-ErrorPage {
	display: none !important;
}

/* Gray out Pages hidden from menus */
.notinmenu > a {
	color: #89878b !important;
}

/* Fixes extra margin on HTMLEditor Right Title labels */
.htmleditor.field label.right {
	margin-left: 0;
}

/* Aligns UploadField with other normal fields! */
.ss-uploadfield .middleColumn {
	float: left !important;
	clear: none !important;
}

/* Hides Pages that can't be created in Add page list */
#Form_AddForm_PageType li.disabled { 
    display: none !important;
}

/* Float Gridfield 'Add New' button to the right */
.ss-gridfield > div.ss-gridfield-buttonrow-before {
	float: right;
}

/* Hide TinyMCE HTMLEditor third row of buttons */
.mceToolbarRow3 { display: none;}

Some of these might already be addressed in 4.0 but I find the CMS experience better with these updates