The files you need to edit are named GameMenu.res (located in the resource folder of your hud), and MainMenuOverride.res (located in the resource/ui directory of your hud). The icons next to the buttons are called subimages. So to get rid of the icon next to the training button for example, navigate to the GameMenu.res file, find TrainingButton and delete its subimage. It should look something like this:
"TrainingButton"
{
"label" "#TF_TRAINING"
"command" "offlinepractice"
"subimage" "glyph_practice" //<-- DELETE THIS LINE
"OnlyAtMenu" "1"
}
Then navigate to the MainMenuOverride.res file and delete the area that has the subimage attributes for the training button at the bottom. It should look something like this:
"TrainingButton"
{
"ControlName" "EditablePanel"
"fieldname" "TrainingButton"
"xpos" "c-307" //c-300
"ypos" "r304"
"zpos" "11"
"wide" "94" //87
"tall" "26"
"visible" "1"
"PaintBackgroundType" "2"
"SubButton"
{
"ControlName" "CExImageButton"
"fieldName" "SubButton"
"xpos" "0"
"ypos" "0"
"wide" "230" //250
"tall" "25" //26
"autoResize" "0"
"pinCorner" "3"
"visible" "1"
"enabled" "1"
"tabPosition" "0"
"textinsetx" "25"
"use_proportional_insets" "1"
"font" "Russo16"
"textAlignment" "west"
"dulltext" "0"
"brighttext" "0"
"default" "1"
"sound_depressed" "UI/buttonclick.wav"
"sound_released" "UI/buttonclickrelease.wav"
"border_default" ""
"border_armed" ""
"paintbackground" "0"
"defaultFgColor_override" "255 255 255 255"
"armedFgColor_override" "227 108 28 255"
"depressedFgColor_override" "46 43 42 255"
"image_drawcolor" "227 108 28 255"
"image_armedcolor" "255 255 255 255"
"SubImage" //<--- ****DELETE FROM HERE****...
{
"ControlName" "ImagePanel"
"fieldName" "SubImage"
"xpos" "6"
"ypos" "6"
"zpos" "1"
"wide" "14"
"tall" "14"
"visible" "1"
"enabled" "1"
"scaleImage" "1"
} //<--- ****DOWN TO HERE****
}
}
Edit: I'll list the names of the other buttons here in case you don't know them:
Play Multiplayer = QuickplayButton
Play Co-op = PlayPVEButton
Shop = GeneralStoreButton
Items = CharacterSetupButton
Replays = ReplayBrowserButton
Workshop = SteamWorkshopButton