Remove comment

Author: greenbigfrog

src/pg_ext/big_decimal.cr

@@ -5,8 +5,6 @@ module PG
     # Returns a BigDecimal representation of the numeric. This retains all precision.
     def to_big_d
       return BigDecimal.new("0") if nan? || ndigits == 0
-
-      # Since BigDecimal allows initialaztion from String, why should one reinvent the wheel?
       BigDecimal.new(to_s)
     end
   end