Minor: Remove merge duplicates in TextDisplayer
Minor: Remove merge duplicates in TextDisplayer

Change-Id: I5d016e1b2093ddfcbc81bf9fd475ddf070669f9c

shaka-project/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player,tvoli/shaka-player