chore: remove duplicate word in comments (#11225)

Signed-off-by: Abirdcfly <fp544037857@gmail.com>

Signed-off-by: Abirdcfly <fp544037857@gmail.com>

tsdb/db.go

@@ -318,7 +318,7 @@ type DBStats struct {
 }
 
 // NewDBStats returns a new DBStats object initialized using the
-// the new function from each component.
+// new function from each component.
 func NewDBStats() *DBStats {
 	return &DBStats{
 		Head: NewHeadStats(),

tsdb/encoding/encoding.go

@@ -79,7 +79,7 @@ func (e *Encbuf) PutUvarintStr(s string) {
 	e.PutString(s)
 }
 
-// PutUvarintBytes writes a a variable length byte buffer.
+// PutUvarintBytes writes a variable length byte buffer.
 func (e *Encbuf) PutUvarintBytes(b []byte) {
 	e.PutUvarint(len(b))
 	e.PutBytes(b)