For the customer to follow the instructions listed below it is necessary that he has the Web Customization Editor set up correctly.
If not, customer will have to set the customization editor up first. More information on how to set up the customization editor can be found in the following MSDL article:
https://resource.microstrategy.com/MSDZ/MSDL/900/docs/WCE_Deploying_Configuring_the_Web_Customization_Editor.htm
STEPS TO FOLLOW:
1. Create a new plugin for this customization and then open the Web Customization editor based on this plugin.
2. Expand Context Menus under Strategy Web configuration folder.
3. Look for reportCellContextMenus and then expand the contents within it.
4. Under default, there are 2 menus called filterOnGrid and FilterOnSelections. Right click on them and select delete:

6. Save the changes and restart the web server.
7. If the Filter On and Filter on Selections options are desired later, the plugin can be removed from the plugins folder under the Strategy Web installation directory.
The example provided in this document is provided “as-is” and user has read the following customization warning:
ADDITIONAL INFORMATION:
The Strategy SDK allows you to customize several Strategy products and extend and integrate the Strategy business intelligence functionality into other applications. However, before changing the way Strategy products look or behave, it is helpful to understand how the application is built. For more information regarding the Strategy products or the process of customizing Strategy products, please refer to Strategy Developer Zone (https://developer.microstrategy.com).
To access the Strategy Developer Zone, you must have access to the Strategy Knowledge Base, you must have purchased the Strategy SDK, and you must be current on your Strategy maintenance agreement. If you are a US-based business and believe that you satisfy all three of these conditions but you do not have access to the Strategy Developer Zone, please contact Strategy Technical Support at support@microstrategy.com or at (703) 848-8700. If you are an international business, please contact Strategy Technical Support at the appropriate email address or phone number found at https://www.microstrategy.com/us/services/support/contact.
CUSTOMIZATION WARNING:
This customization is provided as a convenience to Strategy users and is only directly applicable to the version stated. While this code may apply to other releases directly, Strategy Technical Support makes no guarantees that the code provided will apply to any future or previous builds. In the event of a code change in future builds, Strategy Technical Support makes no guarantee that an updated version of this particular customization will be provided. In the event of a code change in future builds, Strategy may not be able to provide additional code on this matter even though this customization is provided at this time for this specific build. For enhancements to this customization or to incorporate similar functionality into other versions, contact your Account Executive to inquire about Strategy Consulting assistance.