Remove non-existing option from specs

[skalee]

The :scheme option has been temporarily removed in 6839f41 (pull request #83). Providing it in these tests was the odd requirement of the previous implementation. Now it may be (and should be) removed from these examples as irrelevant.

[codecov]

Codecov Report

Merging #87 into master will decrease coverage by 1.68%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #87      +/-   ##
==========================================
- Coverage   99.42%   97.74%   -1.69%     
==========================================
  Files          10       10              
  Lines         174      177       +3     
==========================================
  Hits          173      173              
- Misses          1        4       +3

Impacted Files	Coverage Δ
spec/uri_validator_spec.rb	100% <100%> (ø)	⬆️
lib/uri_format_validator/reacher.rb	87.5% <0%> (-5.84%)	⬇️
...b/uri_format_validator/validators/uri_validator.rb	94.73% <0%> (-5.27%)	⬇️

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[skalee]

This one has been already fixed in a better way in #89, closing.