Remove gaussian numbers

[tthsqe12]

should help with oscar-system/Oscar.jl#1379

[codecov]

Codecov Report

Merging #1315 (0bc5a62) into master (83d286e) will decrease coverage by 0.49%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1315      +/-   ##
==========================================
- Coverage   88.46%   87.96%   -0.50%     
==========================================
  Files          79       75       -4     
  Lines       28962    28043     -919     
==========================================
- Hits        25622    24669     -953     
- Misses       3340     3374      +34     

Impacted Files	Coverage Δ
src/Nemo.jl	22.98% <ø> (ø)
src/flint/FlintTypes.jl	94.56% <ø> (ø)
src/flint/fmpz.jl	88.89% <0.00%> (-3.19%)	⬇️
src/flint/fmpq.jl	93.52% <0.00%> (-0.85%)	⬇️
src/arb/arb.jl	85.71% <0.00%> (-0.11%)	⬇️
src/flint/gfp_fmpz_elem.jl	87.95% <0.00%> (+1.57%)	⬆️

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[fingolfin]

Huh, isn't that a bit of an overreaction? As long as this code is useful to someone, I see no harm in keeping it. The only thing relevant about this code for oscar-system/Oscar.jl#1379 is that the globals QQi and ZZi should not be exported in Oscar.jl. That's all?

[tthsqe12]

Nah, I think it can just go to the dust bin:

• It looks like QQi can never become a number field, which was its raison d'etre
• Fredrik is going to do these in flint/arb

[tthsqe12]

Ah, the continued fractions are being used by oscar test code.