XSLT Pattern matching - Remove Ancestors

I'm exporting bar graph data from SSRS as XML and most of the time it looks great but in some cases it gets /SeriesX/CategoryX/ nodes. When .net reads those into a datatable the dat gets split out into three related tables; Series0, Category0, and Value.

I need to remove /SeriesX/CategoryX/ from this:

  <My_Location_Chart>
    <Series0>
      <Category0>
        <Value Y="0.813084112149533" />
      </Category0>
    </Series0>
    <Series1>
      <Category0>
        <Value Y="0.818783068783069" />
      </Category0>
    </Series1>
    <Series2>
      <Category0>
        <Value Y="0.818709209572154" />
      </Category0>
    </Series2>
  </My_Location_Chart>

So it looks like this:

  <My_Location_Chart>
      <Value Y="0.813084112149533" />
      <Value Y="0.818783068783069" />
      <Value Y="0.818709209572154" />
  </My_Location_Chart>

There are other charts that use SeriesX values and I don't want to screw those up, but none are in the pattern of /SeriesX/CategoryX/, so I only want to match that pattern.

I have tried the following to remove the Category nodes. It's close, but not exactly what I need:

    <xsl:template match="@*|node()" >
       <xsl:copy>
          <xsl:apply-templates select="@*|node()" />
       </xsl:copy>
    </xsl:template>

    <xsl:template match="*[not(descendant-or-self::*[text()[normalize-space()] | @*])]"/>


  <xsl:template match="rep:Category0" >
    <xsl:apply-templates select="*" />
  </xsl:template>

The above creates this:

  <My_Location_Chart>
    <Series0>
      <Value Y="0.813084112149533" />
    </Series0>
    <Series1>
      <Value Y="0.818783068783069" />
    </Series1>
    <Series2>
      <Value Y="0.818709209572154" />
    </Series2>
  </My_Location_Chart>

Any suggestions are welcome. I'm new to XSLT to go easy on me. Thanks!