[dubbo-1929]: remove the verison property that is no use (#1929)

[luyuanwan]

remove the verison property that is no use, you can see issue #1929

[codecov-io]

Codecov Report

Merging #2078 into master will decrease coverage by 0.11%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2078      +/-   ##
============================================
- Coverage     53.06%   52.95%   -0.12%     
- Complexity     4956     5004      +48     
============================================
  Files           559      570      +11     
  Lines         24894    25552     +658     
  Branches       4432     4492      +60     
============================================
+ Hits          13211    13530     +319     
- Misses         9661     9967     +306     
- Partials       2022     2055      +33

Impacted Files	Coverage Δ	Complexity Δ
...apache/dubbo/rpc/protocol/dubbo/FutureAdapter.java	58.06% <0%> (-6.46%)	3% <0%> (ø)
.../dubbo/remoting/transport/netty4/NettyChannel.java	61.25% <0%> (-5%)	22% <0%> (-1%)
...he/dubbo/remoting/transport/netty/NettyServer.java	67.85% <0%> (-3.58%)	8% <0%> (-1%)
...e/dubbo/remoting/transport/netty4/NettyServer.java	72.13% <0%> (-3.28%)	9% <0%> (-1%)
...dubbo/rpc/protocol/dubbo/CallbackServiceCodec.java	77.2% <0%> (-1.48%)	29% <0%> (ø)
...apache/dubbo/rpc/protocol/dubbo/DubboProtocol.java	58.33% <0%> (-0.84%)	30% <0%> (-1%)
.../java/org/apache/dubbo/config/ReferenceConfig.java	46.97% <0%> (-0.72%)	38% <0%> (ø)
...e/dubbo/rpc/protocol/thrift/ThriftNativeCodec.java	0% <0%> (ø)	0% <0%> (?)
...rpc/protocol/thrift/ext/MultiServiceProcessor.java	12.76% <0%> (ø)	3% <0%> (?)
...o/rpc/protocol/thrift/DubboClassNameGenerator.java	100% <0%> (ø)	3% <0%> (?)
... and 10 more

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[ralf0131]

Looks good to me! Thanks for the pull request!