Remove unused variable in CoefTable printing (#830)

Author: nalimilan

src/statmodels.jl

@@ -166,7 +166,6 @@ function show(io::IO, ::MIME"text/markdown", ct::CoefTable)
     nmswidths = pushfirst!(length.(colnms), 0)
     A = [nmswidths[i] > sum(A[i]) ? (A[i][1]+nmswidths[i]-sum(A[i]), A[i][2]) : A[i]
          for i in 1:length(A)]
-    totwidth = sum(sum.(A)) + 2 * (length(A) - 1)
 
     # not using Markdown stdlib here because that won't give us nice decimal
     # alignment (even if that is lost when rendering to HTML, it's still nice