Brando provide option to remove Featured Image in post page.
Please follow below steps to remove Featured Image in post page.
Step 1: Navigate to Admin > Posts > Add/Edit any post
Step 2: Using Right side bar > Format Box > Select Image Type (See below image for more information)
Step 3: Navigate to Brando Post Format Settings (See below image for more information)
Step 4: Select “No” To “Featured Image In Post Page” Box.