Make the emloyee's data points and axis titles invisible.
Click the arrow next to the Sales Rep field and remove the employees name
You can't delete the rep from the chart without first deleting the data.
Hide that rep's row(s) in the underlying list, which automatically removes that rep from the chart
Design, layout, Format, Analyze
Data, Design, Layout, Format
View, Developer, Design, layout.
PivotChart Tools Design tab
PivotChart Tools Layout tab
PivotChart Tools Format tab
PivotChart Tools Analyze tab