scalac flag cleanup

Author: ddworak

build.sbt

@@ -15,11 +15,9 @@ val commonSettings = Seq(
     "-language:implicitConversions",
     "-language:existentials",
     "-language:dynamics",
-    "-language:postfixOps",
     "-language:experimental.macros",
     "-Xfatal-warnings",
-    "-Xlint:_,-missing-interpolator,-unused",
-    "-Yrangepos",
+    "-Xlint:_",
     "-Ybackend-parallelism", "8",
     "-Ycache-plugin-class-loader:last-modified",
     "-Ycache-macro-class-loader:last-modified",