actionify remove policy API

[bowenlan-amzn]

Issue #, if available:
#292

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

Merging #293 into master will increase coverage by 0.00%.
The diff coverage is 81.81%.

@@            Coverage Diff            @@
##             master     #293   +/-   ##
=========================================
  Coverage     74.88%   74.88%           
- Complexity      718      735   +17     
=========================================
  Files            95      100    +5     
  Lines          4009     4050   +41     
  Branches        633      636    +3     
=========================================
+ Hits           3002     3033   +31     
- Misses          681      686    +5     
- Partials        326      331    +5     

Impacted Files	Coverage Δ	Complexity Δ
...ransport/action/removepolicy/RemovePolicyAction.kt	66.66% <66.66%> (ø)	2.00 <2.00> (?)
...action/removepolicy/TransportRemovePolicyAction.kt	73.58% <73.58%> (ø)	2.00 <2.00> (?)
...ansport/action/removepolicy/RemovePolicyRequest.kt	81.81% <81.81%> (ø)	5.00 <5.00> (?)
...temanagement/transport/action/ISMStatusResponse.kt	93.33% <93.33%> (ø)	6.00 <6.00> (?)
...ticsearch/indexmanagement/IndexManagementPlugin.kt	90.76% <100.00%> (-0.41%)	9.00 <0.00> (ø)
...temanagement/resthandler/RestRemovePolicyAction.kt	90.90% <100.00%> (+9.87%)	7.00 <4.00> (ø)
...nsport/action/removepolicy/RemovePolicyResponse.kt	100.00% <100.00%> (ø)	2.00 <2.00> (?)
...ment/indexstatemanagement/util/RestHandlerUtils.kt	100.00% <100.00%> (ø)	0.00 <0.00> (ø)
...dexstatemanagement/elasticapi/ElasticExtensions.kt	61.53% <0.00%> (-3.85%)	0.00% <0.00%> (ø%)
... and 4 more

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