remove the active_support dependencies

[JacksonTian]

You need to complete

• unit tests and/or feature tests
• documentation is changed or added

[codecov-io]

Codecov Report

Merging #22 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master    #22   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           3      3           
  Lines         174    174           
=====================================
  Hits          174    174

Impacted Files	Coverage Δ
lib/aliyunsdkcore/roa_client.rb	100% <100%> (ø)	⬆️

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (3f52d05) to head (73299e7).
⚠️ Report is 23 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #22   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines          174       174           
=========================================
  Hits           174       174           

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