Remove bad logging configuration. Let the user decide

[argaen]

Closes #302

[codecov-io]

Codecov Report

Merging #304 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #304      +/-   ##
=========================================
+ Coverage    99.2%   99.2%   +<.01%     
=========================================
  Files          12      11       -1     
  Lines         882     883       +1     
  Branches       93      93              
=========================================
+ Hits          875     876       +1     
  Misses          7       7

Impacted Files	Coverage Δ
aiocache/__init__.py	81.81% <100%> (+0.86%)	⬆️
aiocache/decorators.py	100% <100%> (ø)	⬆️
aiocache/serializers.py	91.89% <100%> (+0.22%)	⬆️
aiocache/base.py	100% <100%> (ø)	⬆️

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