setup.exe /ACTION=uninstall /FEATURES=Feature_List /INSTANCENAME=Instance_Name

Feature_List:

SQL            Installs the SQLEngine component, the Replication component, and the Fulltext component.
Tools        Installs the ToolsClient component and the BOL component.
.............................

e.g.

setup.exe /ACTION=uninstall /FEATURES=SQL,AS,BOL,SSMS /INSTANCENAME=MSSQLSERVER