We can remove/hide the navbar in blogger.
Follow below steps to remove/hide navbar in blogger:
Step1: Go to blogger dashboard.
Step2: Click on template.
Step3: Click on customise.
Step3: Click on advanced.
Step3: Click on add CSS.
Step4: And add below code in add CSS,
#navbar-iframe {display: none !important;}
body .navbar {height:0px;}
.content-outer {margin-top:0px;}
Increase or decrease the px value as per your need.