Decision task: remove remanents of Linux ARM tasks
Decision task: remove remanents of Linux ARM tasks

CC https://github.com/servo/servo/pull/23633

saneyuki/servo,larsbergstrom/servo,larsbergstrom/servo,saneyuki/servo,nnethercote/servo,paulrouget/servo,splav/servo,splav/servo,paulrouget/servo,DominoTree/servo,saneyuki/servo,KiChjang/servo,splav/servo,nnethercote/servo,larsbergstrom/servo,larsbergstrom/servo,KiChjang/servo,saneyuki/servo,larsbergstrom/servo,nnethercote/servo,saneyuki/servo,KiChjang/servo,saneyuki/servo,KiChjang/servo,paulrouget/servo,notriddle/servo,KiChjang/servo,paulrouget/servo,DominoTree/servo,KiChjang/servo,splav/servo,DominoTree/servo,notriddle/servo,splav/servo,paulrouget/servo,splav/servo,paulrouget/servo,notriddle/servo,DominoTree/servo,DominoTree/servo,nnethercote/servo,nnethercote/servo,DominoTree/servo,paulrouget/servo,KiChjang/servo,DominoTree/servo,splav/servo,saneyuki/servo,larsbergstrom/servo,nnethercote/servo,KiChjang/servo,notriddle/servo,saneyuki/servo,DominoTree/servo,nnethercote/servo,saneyuki/servo,KiChjang/servo,nnethercote/servo,nnethercote/servo,splav/servo,paulrouget/servo,paulrouget/servo,larsbergstrom/servo,notriddle/servo,larsbergstrom/servo,larsbergstrom/servo,notriddle/servo,splav/servo,nnethercote/servo,DominoTree/servo,KiChjang/servo,DominoTree/servo,paulrouget/servo,notriddle/servo,saneyuki/servo,larsbergstrom/servo,splav/servo,notriddle/servo,notriddle/servo,notriddle/servo