Removing unused code and simplifying few dependencies

build.sbt

@@ -506,15 +506,7 @@ lazy val logger = (project in file("lib/scala/logger"))
   )
 
 lazy val `syntax-definition` =
-  (project in file("lib/scala/syntax/definition"))
-    .dependsOn(logger)
-    .settings(
-      scalacOptions ++= Seq("-Ypatmat-exhaust-depth", "off"),
-      libraryDependencies ++= monocle ++ scalaCompiler ++ Seq(
-        "org.typelevel" %% "cats-core" % catsVersion,
-        "org.typelevel" %% "kittens"   % kittensVersion
-      )
-    )
+  project in file("lib/scala/syntax/definition")
 
 lazy val syntax = (project in file("lib/scala/syntax/specialization"))
   .dependsOn(`syntax-definition`)

lib/scala/syntax/definition/src/main/scala/org/enso/syntax/text/AST.scala

@@ -1,7 +1,5 @@
 package org.enso.syntax.text
 
-import cats.Monoid
-
 ////////////////////////////////////////////////////////////////////////////////
 //// AbsolutePosition //////////////////////////////////////////////////////////
 ////////////////////////////////////////////////////////////////////////////////
@@ -15,24 +13,3 @@ import cats.Monoid
 case class Location(start: Int, end: Int) {
   def length: Int = end - start
 }
-
-object Location {
-  implicit val optionSpanMonoid: Monoid[Option[Location]] =
-    new Monoid[Option[Location]] {
-      def empty: Option[Location] = None
-
-      def combine(
-        x: Option[Location],
-        y: Option[Location]
-      ): Option[Location] =
-        x match {
-          case None => y
-          case Some(lSpan @ Location(lStart, _)) =>
-            y match {
-              case None => Some(lSpan)
-              case Some(Location(_, rEnd)) =>
-                Some(Location(lStart, rEnd))
-            }
-        }
-    }
-}