For example we want to hide "Section Course Outline" report from print menu.
In your xml file add "menu="False" ".
<report
id="report_section_course_outline"
model="obe.core.section"
string="Section Course Outline"
name="obe_reports_hec.report_section_outline"
file="obe_reports_hec.report_section_course_outline"
report_type="qweb-pdf"
menu="False"/>