function chngPicture() {
    var remCol=document.getElementById("remCol");
    
    var masterImg3=document.getElementById("masterImg3");
    var masterImg4=document.getElementById("masterImg4");

    var slaveImg3=document.getElementById("slaveImg3");
    var slaveImg4=document.getElementById("slaveImg4");

    masterImg3.removeChild("slaveImg3");
    masterImg4.removeChild("slaveImg4");
               while (remCol.firstChild || remCol.lastChild) {
                   remCol.removeChild;
                   remCol.removeChild(remCol.lastChild);
               }

}

<table width="100%" height="500%"cellpadding="5" cellspacing="0" >
   <tr>
    <td width="33%", height="500%"><div id="colona1">
			<p>Представляется </p>
		</div></td>  
       <td width="10%"><div id="colona2"> 
			<img src="" alt="">		
           <img id="slaveImg3" src="" alt="">
		</div></td>
       
    <td width="10%"><div id="colona3">
<img src="" alt="">
        <img id="slaveImg4" src="" alt="">
        
       </div></td>
       <span id="remCol">
       <td width="10%"><div >  
			<img id="" alt="">
		</div></td>
       
       <td width="10%"><div >  
			<img id="masterImg4" src="" alt="">
		</div></td>
    </span>

function chngPicture() {
    var remCol=document.getElementById("remCol");
    remCol.parentNode.removeChild(remCol) ;
 }