Remove crs (custom map projection) feature to match standard

[rayrrr]

Fix for #97

• Remove crs class and references. All GeoJSON files must be in the WGS84 datum.

[codecov]

Codecov Report

Merging #124 into master will increase coverage by 1.28%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #124      +/-   ##
==========================================
+ Coverage   92.64%   93.93%   +1.28%     
==========================================
  Files          11       10       -1     
  Lines         367      346      -21     
  Branches       70       69       -1     
==========================================
- Hits          340      325      -15     
+ Misses         17       13       -4     
+ Partials       10        8       -2

Impacted Files	Coverage Δ
geojson/factory.py	100% <ø> (ø)	⬆️
geojson/geometry.py	100% <100%> (+2.29%)	⬆️
geojson/utils.py	83.8% <0%> (+1.9%)	⬆️

---

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[codecov]

Codecov Report

Merging #124 into master will increase coverage by 1.28%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #124      +/-   ##
==========================================
+ Coverage   92.64%   93.93%   +1.28%     
==========================================
  Files          11       10       -1     
  Lines         367      346      -21     
  Branches       70       69       -1     
==========================================
- Hits          340      325      -15     
+ Misses         17       13       -4     
+ Partials       10        8       -2

Impacted Files	Coverage Δ
geojson/factory.py	100% <ø> (ø)	⬆️
geojson/geometry.py	100% <100%> (+2.29%)	⬆️
geojson/utils.py	83.8% <0%> (+1.9%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 450ea7d...00aed95. Read the comment docs.