Hotfix: MLP.jittable() for PyTorch 1.10

[rusty1s]

No description provided.

[codecov]

Codecov Report

Merging #4648 (cb6069e) into master (9c5cbb2) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4648   +/-   ##
=======================================
  Coverage   82.96%   82.96%           
=======================================
  Files         316      316           
  Lines       16773    16774    +1     
=======================================
+ Hits        13916    13917    +1     
  Misses       2857     2857           

Impacted Files	Coverage Δ
torch_geometric/nn/models/mlp.py	98.48% <100.00%> (+0.02%)	⬆️

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