combining 3 codes

Thank you. When I combined the code for the DC motors and the ultrasonic sensor with the buzzer, it verified, but I want to know if I'll have to remove the delays in the code. This is the code so far:

/*
UltraRobot
the wheels, ultrasonic sensor, and buzzer
*/

//Define Pins
//Motor A
int enableA = 5;
int MotorA1 = 6;
int MotorA2 = 7;
 
//Motor B
int enableB = 8;
int MotorB1 = 9;
int MotorB2 = 10;

// Define pins for ultrasonic and buzzer
int const trigPin = 12;
int const echoPin = 11;
int const buzzPin = 2; 
int duration, distance;

void setup() {
Serial.begin (9600);
//configure pin modes
pinMode (enableA, OUTPUT);
pinMode (MotorA1, OUTPUT);
pinMode (MotorA2, OUTPUT);  
  
pinMode (enableB, OUTPUT);
pinMode (MotorB1, OUTPUT);
pinMode (MotorB2, OUTPUT); 
  
pinMode(trigPin, OUTPUT); // trig pin will have pulses output
pinMode(echoPin, INPUT); // echo pin should be input to get pulse width
pinMode(buzzPin, OUTPUT); // buzz pin is output to control buzzering
}

void loop() {
  //enabling motor A
  Serial.println ("Enabling Motors");
  digitalWrite (enableA, HIGH);
  digitalWrite (enableB, HIGH);
  delay (1000);
  //do something

  Serial.println ("Motion Forward");
  digitalWrite (MotorA1, LOW);
  digitalWrite (MotorA2, HIGH);

  digitalWrite (MotorB1, LOW);
  digitalWrite (MotorB2, HIGH);

  //9s forward
  delay (9000);
  
  Serial.println ("Motion Backwards");
  //reverse
  digitalWrite (MotorA1,HIGH);
  digitalWrite (MotorA2,LOW);  
  
  digitalWrite (MotorB1,HIGH);
  digitalWrite (MotorB2,LOW);  

  Serial.println ("Stoping motors");
  //stop
  digitalWrite (enableA, LOW);
  digitalWrite (enableB, LOW);
  delay(9000);  
  
  //9s backwards
  delay(9000);
  
  // Duration will be the input pulse width and distance will be the distance to the obstacle in centimeters
	// Output pulse with 1ms width on trigPin
	digitalWrite(trigPin, HIGH); 
	delay(1);
	digitalWrite(trigPin, LOW);
	// Measure the pulse input in echo pin
	duration = pulseIn(echoPin, HIGH);
	// Distance is half the duration devided by 29.1 (from datasheet)
	distance = (duration/2) / 29.1;
	// if distance less than 0.5 meter and more than 0 (0 or less means over range) 
    if (distance <= 50 && distance >= 0) {
    	// Buzz
    	digitalWrite(buzzPin, HIGH);
    } else {
    	// Don't buzz
    	digitalWrite(buzzPin, LOW);
    }
    // Waiting 60 ms won't hurt any one
    delay(60);
}