Disable tooltip hint in Visual Studio Code

To hide those hints you can just add "editor.parameterHints": false to your settings.json. Found the answer in here.

editor.hover.enabled: false in settings.json to Tooltip

Click on Edit in settings.json

There are two panes

Default User Settings

"editor.quickSuggestions": {
    "other": false,
    "comments": false,
    "strings": false
  }

User Settings

"editor.parameterHints.enabled": false,
"editor.suggest.snippetsPreventQuickSuggestions": false,
"html.suggest.html5": false,
"editor.snippetSuggestions": "none",

This also can be done UI.

Setting Snippet Suggestions : false

Update August 2018 (version 1.27)

Goto File=>Preference=>Settings

Text Editor => Suggestions

Click on Edit in settings.json

"editor.parameterHints.enabled": false,
"editor.suggest.snippetsPreventQuickSuggestions": false,
"html.suggest.html5": false,

Update your suggest options and save.

Before August 2018

Goto File=>Preference=>User Settings

You will find settings.json

// Configures if the built-in HTML language support suggests Angular tags and properties.
"html.suggest.angular1": false,

"html.suggest.ionic": false,

"html.suggest.html5": false,

Just find your language and set suggest = false

Update

Setting to turn off ALL popups

"editor.parameterHints": false

"editor.hover.enabled": false,

is your bulletproof solution. Then you can use CTLR + K, CTLR + I.