Remove Google+ share icon (#1796)
Remove Google+ share icon (#1796)

As Google+ doesn't exist anymore, the link in social sharing list should be removed.
doomspork/elixir-school,doomspork/elixir_school,nscyclone/elixir-school,doomspork/elixir_school,doomspork/elixir-school,nscyclone/elixir-school,doomspork/elixir-school,nscyclone/elixir-school,nscyclone/elixir-school,doomspork/elixir_school