Uninstalling just the Visual Studio Plugin

Option 1
When running the Liquid Studio installer, on the 'Select Features' page, deselect the feature 'Visual Studio Extensions' (click the drop down arrow next to the feature and select 'Entire feature will be unavailable'.)
Option 2
Run Microsoft Visual Studio and select the menu Tools->Extensions and Updates. Locate the Liquid Studio entry from Installed->Tools and click 'Uninstall'.
The next time you run Microsoft Visual Studio, the VSIX Installer will run allowing you to uninstall the Liquid Studio Extension.