remove additional scmInfo injection

[daniel-sudz]

closes #1998

[codecov-commenter]

Codecov Report

Merging #1999 (df850a2) into develop (a0516e0) will increase coverage by 15.95%.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             develop    #1999       +/-   ##
==============================================
+ Coverage      17.98%   33.94%   +15.95%     
- Complexity       696     1175      +479     
==============================================
  Files            344      363       +19     
  Lines          26035    26694      +659     
  Branches        4506     4651      +145     
==============================================
+ Hits            4682     9060     +4378     
+ Misses         20520    16285     -4235     
- Partials         833     1349      +516     

Impacted Files	Coverage Δ
...witter/scalding/typed/functions/FlatMappedFn.scala	41.81% <0.00%> (-1.82%)	⬇️
...alization/runtime_helpers/TraversableHelpers.scala	96.00% <0.00%> (-1.34%)	⬇️
...m/twitter/scalding/typed/functions/Functions.scala	12.04% <0.00%> (-1.21%)	⬇️
...com/twitter/scalding/typed/memory_backend/Op.scala	32.38% <0.00%> (-0.96%)	⬇️
...scala/com/twitter/scalding/hellcats/HellCats.scala	77.21% <0.00%> (ø)
...ng/db/macros/impl/handler/NumericTypeHandler.scala	0.00% <0.00%> (ø)
...src/main/scala/com/twitter/scalding/JsonLine.scala	72.97% <0.00%> (ø)
...tter/scalding/db/macros/impl/JdbcFieldSetter.scala	0.00% <0.00%> (ø)
...scalding/db/macros/impl/handler/ColumnFormat.scala	0.00% <0.00%> (ø)
.../scala/com/twitter/scalding/db/ColumnDefiner.scala	24.56% <0.00%> (ø)
... and 112 more

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[daniel-sudz]

@johnynek