diff --git a/mobile.go b/mobile.go
deleted file mode 100644
index befc75a8..00000000
--- a/mobile.go
+++ /dev/null
@@ -1,91 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"time"
-)
-
-// Mobile struct represents a mobile device.
-type Mobile struct {
-	Brand     string
-	Model     string
-	IsOn      bool
-	Battery   int
-	LastUsage time.Time
-}
-
-// TurnOn turns on the mobile device.
-func (m *Mobile) TurnOn() {
-	m.IsOn = true
-	m.LastUsage = time.Now()
-	fmt.Printf("%s %s is now turned on.\n", m.Brand, m.Model)
-}
-
-// TurnOff turns off the mobile device.
-func (m *Mobile) TurnOff() {
-	m.IsOn = false
-	fmt.Printf("%s %s is now turned off.\n", m.Brand, m.Model)
-}
-
-// UseMobile simulates the usage of the mobile device.
-func (m *Mobile) UseMobile(minutes int) {
-	if !m.IsOn {
-		fmt.Println("Please turn on the mobile device first.")
-		return
-	}
-
-	if m.Battery <= 0 {
-		fmt.Println("The mobile device is out of battery. Please charge it.")
-		return
-	}
-
-	m.LastUsage = time.Now()
-	fmt.Printf("Using %s %s for %d minutes.\n", m.Brand, m.Model, minutes)
-
-	// Simulate battery drain
-	m.Battery -= minutes
-	if m.Battery < 0 {
-		m.Battery = 0
-	}
-
-	// Check battery level
-	if m.Battery == 0 {
-		m.TurnOff()
-		fmt.Println("The mobile device is out of battery. Please charge it.")
-	}
-}
-
-// ChargeMobile charges the mobile device.
-func (m *Mobile) ChargeMobile(minutes int) {
-	m.LastUsage = time.Now()
-	m.Battery += minutes
-	if m.Battery > 100 {
-		m.Battery = 100
-	}
-	fmt.Printf("Charging %s %s for %d minutes.\n", m.Brand, m.Model, minutes)
-}
-
-func main() {
-	// Create a new mobile device
-	myMobile := Mobile{
-		Brand:   "Apple",
-		Model:   "iPhone X",
-		IsOn:    false,
-		Battery: 50,
-	}
-
-	// Turn on the mobile device
-	myMobile.TurnOn()
-
-	// Simulate using the mobile device
-	myMobile.UseMobile(60)
-
-	// Charge the mobile device
-	myMobile.ChargeMobile(30)
-
-	// Simulate using the mobile device again
-	myMobile.UseMobile(120)
-
-	// Turn off the mobile device
-	myMobile.TurnOff()
-}