How can I remove the sharing plugin on the web player?

Disabling the sharing plugin for the web player can be done through the "EMBED" tool which is available for each of your Channels as well as for each of your single video/audio file. 

How to disable the sharing feature for the Channel Player:

Navigate to the left-hand menu in your Media Cloud and select "CHANNELS".  Then choose the Channel Type and select the Channel you would like to disable the sharing feature for. Switch to the "EMBED" tab and select "No Sharing". 

How to disable the sharing feature for the Single Video/Audio Player:

Simply click on the Video or Audio Archive on the left-hand menu, then select the video or audio file you would like to remove the sharing feature for. Switch to the "EMBED" tab and select "No Sharing".