title: How to remove underline of input text in the TextFormField?
body: <p><a href="https://i.stack.imgur.com/d3C2y.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/d3C2y.png" alt="enter image description here"></a></p>
  
  <p>I want to remove the black underline that you see under the text. It come whenever I input any character and addon with every character. How can I achieve this? 
  Here is my TextFieldForm code:</p>
  
  <pre><code>TextFormField(
            controller: _controller,
            showCursor: false,
            toolbarOptions: ToolbarOptions(
              cut: true,
              copy: false,
              selectAll: true,
              paste: true,
            ),
            decoration: InputDecoration(
              border: InputBorder.none,
              filled: true,
              fillColor: Colors.white,
              hintStyle: TextStyle(fontSize: 20),
              hintText: "Search the word",
              contentPadding: EdgeInsets.only(left: 20),
              enabledBorder: OutlineInputBorder(borderSide: BorderSide.none),
              suffixIcon:
                  Icon(Icons.search, color: Colors.black.withOpacity(0.6)),
              focusedBorder: OutlineInputBorder(
                borderSide: BorderSide.none,
              ),
            ),
          ),
  </code></pre>
  
  <p>I tried "border: InputBorder.none" but fail....</p>