Remove unnecessary async code

[IvanGoncharov]

No description provided.

[codecov]

Codecov Report

Merging #269 into master will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #269      +/-   ##
==========================================
- Coverage   99.51%   99.49%   -0.02%     
==========================================
  Files          19       19              
  Lines         618      598      -20     
  Branches       36       38       +2     
==========================================
- Hits          615      595      -20     
  Misses          3        3              

Impacted Files	Coverage Δ
src/__tests__/starWarsConnectionTests.js	100.00% <100.00%> (ø)
src/__tests__/starWarsMutationTests.js	100.00% <100.00%> (ø)
src/__tests__/starWarsObjectIdentificationTests.js	100.00% <100.00%> (ø)
src/connection/__tests__/connection.js	100.00% <100.00%> (ø)
src/mutation/__tests__/mutation.js	96.49% <100.00%> (ø)
src/mutation/mutation.js	100.00% <100.00%> (ø)
src/node/__tests__/global.js	100.00% <100.00%> (ø)
src/node/__tests__/node.js	100.00% <100.00%> (ø)
src/node/node.js	100.00% <100.00%> (ø)

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