Alerts are evolving into Playbooks and we are deprecating the Sales Alerts Feed. Here's a guide to uninstall it. To get access to the Playbooks, you just have to install again the Salesforce package (see here)

Step 1: Remove the VisualForce page from your Salesforce Home page layout 

• Go the Sales Home page
  
• At the top right, click on the gear icon then "Edit page"
• Then click on delete the Sales Feed component 
  
• Adjust the layout for your Sales team

Step 2: Delete the VisualForce page for the Alert Feed

• Click on gear icon at the top right then Setup
• Search for VisualForce Pages
  
• Search for MadKuduSalesIntelligenceAlertsFeed
• Delete it