title: How to delete dev profile in Intellij? and Why Maven profiles in Intellij has three states?
body: <h1>Question 1:</h1>
  
  <p>Erveytime I import a maven project from existing source, Intellij create a dev profile, but there is no such a dev profile in pom.xml. Here is my profiles in pom.xml:</p>
  
  <p><a href="https://i.stack.imgur.com/cYyLv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cYyLv.png" alt="enter image description here"></a></p>
  
  <p>But, there is a dev profile shown in maven projects window:</p>
  
  <p><a href="https://i.stack.imgur.com/MBjSA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MBjSA.png" alt="enter image description here"></a></p>
  
  <p>How to delete the inexplicable dev profile?</p>
  
  <h1>Question 2:</h1>
  
  <p>All the checkbox I have seen before have two states: checked or unchecked. However, the checkbox of a profile in Intellij has three states:</p>
  
  <p><a href="https://i.stack.imgur.com/BBJzt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BBJzt.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/FYqPH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FYqPH.png" alt="enter image description here"></a></p>
  
  <p><a href="https://i.stack.imgur.com/RzgZ8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RzgZ8.png" alt="enter image description here"></a></p>
  
  <p>What's the difference?</p>