Remove redundant deps

[willtebbutt]

#105 points out that there appear to be redundant deps. This PR will remove them if it is in fact the case that they are unused.

[github-actions]

Performance Ratio:

┌────────────────────────────┬────────┬─────────┬─────────────┬─────────┐
│                      Label │  Tapir │  Zygote │ ReverseDiff │  Enzyme │
│                     String │ String │  String │      String │  String │
├────────────────────────────┼────────┼─────────┼─────────────┼─────────┤
│                        sum │  138.0 │   0.784 │        3.15 │   0.713 │
│                       _sum │   25.5 │   500.0 │        27.0 │   0.121 │
│                   kron_sum │  201.0 │    3.59 │       205.0 │    25.3 │
│              kron_view_sum │  254.0 │    11.6 │       231.0 │    8.68 │
│      naive_map_sin_cos_exp │   8.38 │ missing │        8.74 │    2.78 │
│            map_sin_cos_exp │   10.8 │    1.69 │         7.5 │    3.36 │
│      broadcast_sin_cos_exp │   9.69 │    2.54 │        1.63 │     2.8 │
│                 simple_mlp │   24.8 │    3.13 │        12.2 │    3.88 │
│                     gp_lml │   43.1 │    4.19 │     missing │ missing │
│ turing_broadcast_benchmark │   19.6 │ missing │        33.5 │ missing │
└────────────────────────────┴────────┴─────────┴─────────────┴─────────┘