cleanup warning for 0.11.2

[javeme]

Change-Id: Ie6c1eb7a8e10453672541671d3e74c151518a77f

[codecov]

Codecov Report

Merging #1243 into master will decrease coverage by 0.50%.
The diff coverage is 13.63%.

@@             Coverage Diff              @@
##             master    #1243      +/-   ##
============================================
- Coverage     62.21%   61.71%   -0.51%     
+ Complexity     5736     5709      -27     
============================================
  Files           371      374       +3     
  Lines         31153    31251      +98     
  Branches       4381     4386       +5     
============================================
- Hits          19382    19285      -97     
- Misses         9795     9986     +191     
- Partials       1976     1980       +4     

Impacted Files	Coverage Δ	Complexity Δ
...hugegraph/api/traversers/JaccardSimilarityAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...m/baidu/hugegraph/api/traversers/KneighborAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...va/com/baidu/hugegraph/api/traversers/KoutAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...graph/api/traversers/MultiNodeShortestPathAPI.java	0.00% <0.00%> (ø)	0.00 <0.00> (ø)
...om/baidu/hugegraph/auth/StandardAuthenticator.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...hugegraph/backend/serializer/BinarySerializer.java	85.00% <ø> (ø)	116.00 <0.00> (ø)
...ugegraph/backend/store/raft/RaftSharedContext.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...idu/hugegraph/backend/store/raft/StoreClosure.java	0.00% <ø> (ø)	0.00 <0.00> (ø)
...hugegraph/backend/store/raft/rpc/RaftRequests.java	2.23% <ø> (ø)	0.00 <0.00> (ø)
...du/hugegraph/backend/tx/GraphIndexTransaction.java	81.32% <ø> (ø)	203.00 <0.00> (ø)
... and 25 more

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