Remove printing the whole config for --debug

[arturbosch]

Spams the whole console page and brings little to no insight.
Never actually used this statement for debugging, somebody did?

[codecov-io]

Codecov Report

Merging #2280 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2280      +/-   ##
============================================
- Coverage     81.69%   81.69%   -0.01%     
  Complexity     2112     2112              
============================================
  Files           348      348              
  Lines          6031     6030       -1     
  Branches       1104     1104              
============================================
- Hits           4927     4926       -1     
  Misses          518      518              
  Partials        586      586

Impacted Files	Coverage Δ	Complexity Δ
.../io/gitlab/arturbosch/detekt/cli/runners/Runner.kt	87.27% <ø> (-0.23%)	15 <0> (ø)

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