rpn: eliminate RPN.mode duplication with Operations.mode

Remove the mode field from the RPN struct, which was duplicated from
Operations.mode. All reads of r.mode in rpn_parse.go and rpn_ops.go
now go through r.ops.GetMode().

- Add GetMode() to the Operator interface so RPN can access mode
  through its Operator dependency
- Remove mode field from RPN struct in rpn_state.go
- Remove mode initialization from NewRPN
- Update SetMode to only set mode on Operations
- Update GetMode to delegate to Operations
- Replace r.mode with r.ops.GetMode() in rpn_parse.go (5 sites)
- Replace r.mode with r.ops.GetMode() in rpn_ops.go (1 site)

0 files changed, 0 insertions, 0 deletions