add convolve command

cmd/shoelace.go

@@ -17,7 +17,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
 package cmd
 
 import (
-	"bufio"
 	"fmt"
 	"os"
 	"strconv"
@@ -29,16 +28,6 @@ import (
 
 var shoelaceFile string
 
-func splitLines(file *os.File) []string {
-	slice := make([]string, 0)
-	scanner := bufio.NewScanner(file)
-	for scanner.Scan() {
-		slice = append(slice, scanner.Text())
-	}
-
-	return slice
-}
-
 func readFromFile(filepath string) ([]lib.Point, error) {
 	points := make([]lib.Point, 0)
 	file, err := os.Open(filepath)