Reduce analyzer warnings (bazel-contrib#1135)

Author: liucijus

third_party/dependency_analyzer/src/main/io/bazel/rulesscala/dependencyanalyzer/ScalaVersion.scala

@@ -56,6 +56,7 @@ object ScalaVersion {
     code: c.Expr[String]
   ): c.Tree = {
     import c.{universe => u}
+    import u._
 
     // Due to non-deterministic code generation of quasiquotes, we do
     // not use them