Update _episodes/02-installation.md

Co-authored-by: SarahAlidoost <[email protected]>

Author: rswamina

_episodes/02-installation.md

@@ -25,8 +25,6 @@ be found in the
 We will first install Conda, and then ESMValTool. We end this chapter by testing
 that the installation was successful.
 
-
-## ESMValTool Installation/Usage  Options - A quick summary
  Before we begin, here are all the possible ways in which you can use ESMValTool
  depending on your level of expertise or involvement with ESMvalTool and 
  associated software such as GitHub and Conda.