I assume you are referring to the indicators. The basic way of removing indicators is via the terminal:
sudo apt-get remove my-weather-indicator.
sudo apt-get remove battery-status-indicator.
sudo apt-get remove evolution-indicator
sudo apt-get remove indicator-me indicator-messages.
etc for for respective indicators. This and some other methods are mentioned in an earlier post here (Since you are not telling us which solutions you have tried, it is not easy to know if you have tried them out already.)
Moreover, some indicators (at least) may be removed via the GUI, such as the keyboard layout indicator, as described here.