[FIR] Refactor session components initialization

From now all customization of session should perform via DSL which
  declared in FirSessionFactory. Registration or mutation session
  services from other places is prohibited

compiler/fir/java/src/org/jetbrains/kotlin/fir/java/FirJavaVisibilityChecker.kt

@@ -42,7 +42,3 @@ object FirJavaVisibilityChecker : FirVisibilityChecker() {
         }
     }
 }
-
-fun FirSession.registerJavaVisibilityChecker() {
-    register(FirVisibilityChecker::class, FirJavaVisibilityChecker)
-}