Remove useless function

Looks like it has been broken by 40633768bc
where 'KotlinCompilation.dependencies' switched its type from
KotlinDependency (which is alias to
org.jetbrains.plugins.gradle.model.ExternalDependency) to
KotlinDependencyId (which is alias to Long), leading to safe-cast in the
'reportUnresolvedDependencies' to be always evaluated to 'null'

Rationale for removing it completely instead of fixing:
No one has noticed that this function has been broken + I haven't
managed to find any user-visible behaviour it adds (tried fixing it and
checking project similar to one from
NewMultiplatformProjectImportingTest.testUnresolved, no difference for
me).

idea/kotlin-gradle-tooling/src/KotlinMPPGradleModelBuilder.kt

@@ -62,7 +62,6 @@ class KotlinMPPGradleModelBuilder : ModelBuilderService {
         val targets = buildTargets(projectTargets, sourceSetMap, dependencyResolver, project, dependencyMapper) ?: return null
         computeSourceSetsDeferredInfo(sourceSetMap, targets, isHMPPEnabled(project), shouldCoerceRootSourceSetToCommon(project))
         val coroutinesState = getCoroutinesState(project)
-        reportUnresolvedDependencies(targets)
         val kotlinNativeHome = KotlinNativeHomeEvaluator.getKotlinNativeHome(project) ?: NO_KOTLIN_NATIVE_HOME
         return KotlinMPPGradleModelImpl(
             filterOrphanSourceSets(sourceSetMap, targets, project),
@@ -106,15 +105,6 @@ class KotlinMPPGradleModelBuilder : ModelBuilderService {
         return (project.findProperty("kotlin.native.enableDependencyPropagation") as? String)?.toBoolean() ?: true
     }
 
-    private fun reportUnresolvedDependencies(targets: Collection<KotlinTarget>) {
-        targets.asSequence()
-            .flatMap { it.compilations.asSequence() }
-            .flatMap { it.dependencies.asSequence() }
-            .mapNotNull { (it as? UnresolvedExternalDependency)?.failureMessage }
-            .toSet()
-            .forEach { logger.warn(it) }
-    }
-
     private fun getCoroutinesState(project: Project): String? {
         val kotlinExt = project.extensions.findByName("kotlin") ?: return null
         val getExperimental = kotlinExt.javaClass.getMethodOrNull("getExperimental") ?: return null