Hide Ribbon Tabs

 Create empty sharepoint project then add empty element. Finally add below custom action for hiding copies tab of ribbon.
 
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
  <CustomAction
    Id="DemoHideRibbonTab"
    Location="CommandUI.Ribbon"
    RegistrationId="101"
    RegistrationType="List">
    <CommandUIExtension>
      <CommandUIDefinitions>
        <CommandUIDefinition
        Location="Ribbon.Documents.Copies" />
      </CommandUIDefinitions>
    </CommandUIExtension>
  </CustomAction>
</Elements>


If you hide entire ribbon in list page add below css

1. <style type="text/css">  
2. #s4-ribbonrow{ display:none; }  
3. </style>

#s4-ribbonrow { display:none } –> top ribbon

#s4-leftpanel { display:none } –> left navigation

.s4-ca { margin-left:0px;background:transaparent} –> to keep the margin starting from the left or else you will find a blank space if you use only the above class

.s4-breadcrumb-top { display : none } –> breadcrumb

#s4-titlerow { display:none } –> top ba

#Ribbon\.ListItem\.New\.NewListItem-Large
{
    display:none;
} 

&lt;style type=<span class="str">"text/css"</span>&gt;
#Ribbon\.ListItem\.New\.NewListItem-Large
{
display:none;
}
&lt;/style&gt;

&lt;style type=<span class="str">"text/css"</span>&gt;
#Ribbon\.ListItem\.Manage\.EditProperties-Large
{
display:none;
}
&lt;/style&gt;