Use sbt-tpolecat (closes #14)

build.sbt

@@ -7,7 +7,6 @@ lazy val root = project.in(file("."))
     scalaVersion := "2.12.13",
     licenses += ("Apache-2.0", url("https://www.apache.org/licenses/LICENSE-2.0"))
   )
-  .settings(BuildSettings.buildSettings)
   .settings(BuildSettings.publishSettings)
   .settings(
     resolvers ++= Seq(

project/BuildSettings.scala

@@ -24,31 +24,6 @@ import bintray.BintrayKeys._
  * To enable any of these you need to explicitly add Settings value to build.sbt
  */
 object BuildSettings {
-
-  lazy val buildSettings = Seq[Setting[_]](
-    scalacOptions := Seq(
-      "-deprecation",
-      "-encoding", "UTF-8",
-      "-feature",
-      "-unchecked",
-      "-Ywarn-dead-code",
-      "-Ywarn-inaccessible",
-      "-Ywarn-infer-any",
-      "-Ywarn-nullary-override",
-      "-Ywarn-nullary-unit",
-      "-Ywarn-numeric-widen",
-      "-Ywarn-unused",
-      "-Ywarn-value-discard",
-      "-Ypartial-unification",
-      "-language:higherKinds"
-    ),
-    javacOptions := Seq(
-      "-source", "1.8",
-      "-target", "1.8",
-      "-Xlint"
-    )
-  )
-
   lazy val publishSettings = bintraySettings ++ Seq(
     publishMavenStyle := true,
     publishArtifact := true,

project/plugins.sbt

@@ -1,3 +1,4 @@
 logLevel := Level.Warn
 
 addSbtPlugin("org.foundweekends" % "sbt-bintray" % "0.5.4")
+addSbtPlugin("io.github.davidgregory084" % "sbt-tpolecat" % "0.1.16")

src/main/scala/com/snowplowanalytics/iglu/schemaddl/scalacheck/IgluSchemas.scala

@@ -15,7 +15,6 @@ package com.snowplowanalytics.iglu.schemaddl.scalacheck
 import cats.Monad
 import cats.effect.Clock
 import cats.implicits._
-import com.snowplowanalytics.iglu.client.Client
 import com.snowplowanalytics.iglu.client.validator.CirceValidator
 import com.snowplowanalytics.iglu.client.resolver.{InitListCache, InitSchemaCache, Resolver}
 import com.snowplowanalytics.iglu.client.resolver.registries.RegistryLookup

src/main/scala/com/snowplowanalytics/iglu/schemaddl/scalacheck/JsonStringGen.scala

@@ -14,7 +14,6 @@ package com.snowplowanalytics.iglu.schemaddl.scalacheck
 
 import java.time.{Instant, ZoneOffset}
 import java.time.format.DateTimeFormatter
-import java.util.Locale
 
 import cats._
 import cats.implicits._

src/test/scala/com/snowplowanalytics/iglu/schemaddl/scalacheck/IgluSchemasSpec.scala

@@ -13,8 +13,7 @@
 package com.snowplowanalytics.iglu.schemaddl.scalacheck
 
 import cats.data.EitherT
-import cats.effect.{Clock, IO}
-import cats.syntax.either._
+import cats.effect.IO
 import com.snowplowanalytics.iglu.client.resolver.Resolver
 import com.snowplowanalytics.iglu.client.resolver.registries.Registry
 import com.snowplowanalytics.iglu.core.SchemaKey
@@ -35,7 +34,7 @@ class IgluSchemasSpec extends Specification with ScalaCheck { def is = s2"""
     implicit val arb: Arbitrary[Json] = Arbitrary(gen)
     prop { (json: Json) =>
       IgluSchemas.validate(json, schema) match {
-        case Right(s) =>
+        case Right(_) =>
           true
         case Left(error) =>
           println(s"Failed for schema:\n${json.printWith(Printer.spaces2)}\nReason:\n $error")