title: Remove existing feature from the installed WIX setup
body: <p>I have a Wix Setup of my .Net appplication.I have installed it on my system.
  I want to create a WIX setup with UpgradeVesion to remove some feaures from the installed setup and add new features.
  i use the below code:-</p>
  
  <pre><code>  &lt;Product Id="*"
     Name="MyProduct"
     Language="10313"
     Version="3.0.0.0"
     Manufacturer="My_Company"
     UpgradeCode="6ba277d97-41de-4371-a236-b757b7840f7b"&gt;
  &lt;Package InstallerVersion="200" Compressed="yes" /&gt;
  
  &lt;Upgrade Id="6ba28d97-49de-4371-a236-b757b7840f7b"&gt;
    &lt;UpgradeVersion Minimum="0.0.0.0"
                    IncludeMinimum="yes"
                    OnlyDetect="no"
                    Maximum="3.0.0.0"
                    IncludeMaximum="yes"
                    Property="PREVIOUSFOUND" RemoveFeatures="[ProductFeature1]"/&gt;
  &lt;/Upgrade&gt;
  &lt;InstallExecuteSequence&gt;
    &lt;RemoveExistingProducts Before="InstallInitialize"/&gt;
  &lt;/InstallExecuteSequence&gt;
  
  &lt;MediaTemplate /&gt;
  &lt;UIRef Id="WixUI_InstallDir" /&gt;
  &lt;Property Id="WIXUI_INSTALLDIR" Value="INSTALLFOLDER"/&gt;
      &lt;Feature Id="ProductFeature" Title="TestApp" Level="1"&gt;
          &lt;ComponentGroupRef Id="ProductComponents" /&gt;
  
      &lt;/Feature&gt;
  &lt;Feature Id="ProductFeature1" Title="TestApp" Level="1"&gt;
    &lt;ComponentGroupRef Id="ProductComponent1"/&gt;
  &lt;/Feature&gt;
  &lt;/Product&gt;
  </code></pre>
  
  <p>But i am unable to remove the ProductFeature1.</p>
  
  <p>How can i remove an existing feature from the installed setup. </p>