Remove unnecessarily named return variables

Named return variables should only be used to describe the returned type
further, e.g. `err error` doesn't add any new information and is just
stutter.

1 files changed, 1 insertions, 1 deletions

diff --git a/collector/vmstat_linux.go b/collector/vmstat_linux.go
index 3f68c14..c6a6625 100644
--- a/collector/vmstat_linux.go
+++ b/collector/vmstat_linux.go
@@ -40,7 +40,7 @@ func NewvmStatCollector() (Collector, error) {
         return &vmStatCollector{}, nil
 }
 
-func (c *vmStatCollector) Update(ch chan<- prometheus.Metric) (err error) {
+func (c *vmStatCollector) Update(ch chan<- prometheus.Metric) error {
         file, err := os.Open(procFilePath("vmstat"))
         if err != nil {
                 return err