Remove explicit != methods for Dual

[JamesWrigley]

These are already defined by Base in terms of ==.

Fixes these invalidations seen when loading CurveFit.jl (CC @ChrisRackauckas):

 inserting !=(x::Integer, y::ForwardDiff.Dual{Ty}) where Ty @ ForwardDiff ~/.julia/packages/ForwardDiff/9ocoj/src/dual.jl:159 invalidated:                                                                                                     
   backedges: 1: superseding !=(x, y) @ Base operators.jl:321 with MethodInstance for !=(::Int64, ::Any) (1 children)                                                                                                                          
              2: superseding !=(x, y) @ Base operators.jl:321 with MethodInstance for !=(::Int32, ::Any) (49 children)                                                                                                                         
              3: superseding !=(x, y) @ Base operators.jl:321 with MethodInstance for !=(::Int64, ::Any) (97 children) 

 inserting !=(x::ForwardDiff.Dual{Tx}, y::Integer) where Tx @ ForwardDiff ~/.julia/packages/ForwardDiff/9ocoj/src/dual.jl:158 invalidated:                                                                                                     
   backedges: 1: superseding !=(x, y) @ Base operators.jl:321 with MethodInstance for !=(::Any, ::Bool) (24 children)                                                                                                                          
              2: superseding !=(x, y) @ Base operators.jl:321 with MethodInstance for !=(::Any, ::Int64) (38 children)                                                                                                                         
              3: superseding !=(x, y) @ Base operators.jl:321 with MethodInstance for !=(::Any, ::Int64) (202 children)   

Would it be possible to make a new release with this?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.75%. Comparing base (71258ec) to head (b50f9a7).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #793   +/-   ##
=======================================
  Coverage   90.75%   90.75%           
=======================================
  Files          11       11           
  Lines        1071     1071           
=======================================
  Hits          972      972           
  Misses         99       99           

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[JamesWrigley]

pre failures seem to be because of a JET incompatibility.

[devmotion]

Thanks, seems like a good change, cf https://github.com/JuliaLang/julia/blob/f726949136712f84e8ecfea7429d23e626683c80/base/operators.jl#L308

Can you update the version number?

[JamesWrigley]

Sure, done in b50f9a7.