roll: Remove unused function ltrim.
roll: Remove unused function ltrim.

Former-commit-id: 41b08d0a3081204fc7c06db36eb5e9b10ba8a83c [formerly fa6b82bec4128e99638985ebafc4470ac0226fb2]
Former-commit-id: 9eb416ad1021be07d54bc02e38df475405ad8d78
torhve/ivar2,torhve/ivar2,torhve/ivar2,haste/ivar2