delete windows-specific Test_stop

Doesn't seem to work anymore on Windows 11's Notepad, forget it. macOS
doesn't have such a test anyway, it's fine that Windows doesn't test its
stop() as well.

Author: bokwoon95

testdata/userinput/main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+	fmt.Printf("User Input: ")
+
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		cmd := strings.TrimSpace(scanner.Text())
+
+		fmt.Printf("Received: %s\n", cmd)
+		fmt.Printf("User Input: ")
+	}
+}

util_windows_test.go

@@ -4,64 +4,9 @@
 package main
 
 import (
-	"os/exec"
-	"strings"
 	"testing"
-	"time"
 )
 
-func Test_stop(t *testing.T) {
-	t.Parallel()
-
-	// Ensure no notepad.exe is running.
-	_ = exec.Command("taskkill.exe", "/f", "/im", "notepad.exe").Run()
-
-	// Start notepad.exe as a child process, then kill the parent process with
-	// Process.Kill().
-	cmd := exec.Command("cmd.exe", "/c", "notepad.exe")
-	err := cmd.Start()
-	if err != nil {
-		t.Fatal(err)
-	}
-	time.Sleep(500 * time.Millisecond) // Give time for it to start before killing.
-	_ = cmd.Process.Kill()
-	_ = cmd.Wait()
-
-	// Assert that Process.Kill() did not kill the child notepad.exe process by
-	// checking that it exists with tasklist.
-	b, err := exec.Command("tasklist.exe", "/nh", "/fi", "imagename eq notepad.exe").CombinedOutput()
-	if err != nil {
-		t.Fatal(err)
-	}
-	output := string(b)
-	if !strings.Contains(output, "notepad.exe") {
-		t.Fatalf("notepad.exe was successfully killed by Process.Kill(): %s", output)
-	}
-
-	// Ensure no notepad.exe is running.
-	_ = exec.Command("taskkill.exe", "/f", "/im", "notepad.exe").Run()
-
-	// Start notepad.exe as a child process again, then kill the parent process
-	// with kill().
-	cmd = exec.Command("cmd.exe", "/c", "notepad.exe")
-	err = cmd.Start()
-	if err != nil {
-		t.Fatal(err)
-	}
-	time.Sleep(500 * time.Millisecond) // Give time for it to start before killing.
-	stop(cmd)
-
-	// Assert that kill() killed the child notepad.exe process.
-	b, err = exec.Command("tasklist.exe", "/nh", "/fi", "imagename eq notepad.exe").CombinedOutput()
-	if err != nil {
-		t.Fatal(err)
-	}
-	output = string(b)
-	if strings.Contains(output, "notepad.exe") {
-		t.Fatalf("notepad.exe was not successfully killed by cleanup(): %s", output)
-	}
-}
-
 func Test_joinArgs(t *testing.T) {
 	type TestTable struct {
 		description string