refactor: Remove bluebird from lib/plugins/aws/remove

[juanjoDiaz]

Addresses: #7171

[codecov]

Codecov Report

Merging #9067 (3a5e254) into master (ccba70a) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #9067      +/-   ##
==========================================
- Coverage   87.15%   87.15%   -0.01%     
==========================================
  Files         288      288              
  Lines       11026    11024       -2     
==========================================
- Hits         9610     9608       -2     
  Misses       1416     1416              

Impacted Files	Coverage Δ
lib/plugins/aws/remove/lib/bucket.js	100.00% <100.00%> (ø)
lib/plugins/aws/remove/lib/stack.js	100.00% <100.00%> (ø)

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[pgrzesik]

Thanks once again @juanjoDiaz - as mentioned in related PR, we'd like to follow more iterative, small-steps path - I'm going to close this PR for now.