Remove duplicate command registration
Remove duplicate command registration

This command is already registered on the view and duplicate
the behavior of editor:copy-path if also registered on the workspace

jasonhinkle/tree-view,cgrabowski/webgl-studio-tree-view,tbryant/tree-view,learn-co/learn-ide-tree,matthewbauer/tree-view,thgaskell/tree-view,benjaminRomano/tree-view,ayumi/tree-view,pombredanne/tree-view-1,samu/tree-view,Galactix/tree-view,tomekwi/tree-view,atom/tree-view,rajendrant/tree-view-remote,jarig/tree-view,laituan245/tree-view