Remove parent checks in reshape tests

[jishnub]

On julia nightly, a reshaped Array with identical axes is no longer considered identical to the original array:

julia> A = zeros(2,2);

julia> B = reshape(A, axes(A)...);

julia> A === B # used to be true
false

Because of this, we can't check that the parents of reshaped OffsetArrays are identical anymore. In this PR, these tests are removed. The checks on the reshaped arrays should be enough here.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.46%. Comparing base (97d3bf1) to head (8c4cfcb).
Report is 3 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #363      +/-   ##
==========================================
- Coverage   98.67%   96.46%   -2.22%     
==========================================
  Files           6        6              
  Lines         453      452       -1     
==========================================
- Hits          447      436      -11     
- Misses          6       16      +10     

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