Remove unused

Author: k163377

src/main/kotlin/io/github/projectmapk/jackson/module/kogera/annotationIntrospector/KotlinPrimaryAnnotationIntrospector.kt

@@ -20,7 +20,6 @@ import io.github.projectmapk.jackson.module.kogera.jmClass.JmProperty
 import io.github.projectmapk.jackson.module.kogera.jmClass.JmValueParameter
 import io.github.projectmapk.jackson.module.kogera.reconstructClass
 import io.github.projectmapk.jackson.module.kogera.toSignature
-import kotlinx.metadata.KmClassifier
 import kotlinx.metadata.isNullable
 import java.lang.reflect.Constructor
 import java.lang.reflect.Executable
@@ -140,8 +139,6 @@ private fun Constructor<*>.isPrimarilyConstructorOf(jmClass: JmClass): Boolean =
     ?.let { !it.isSecondary || jmClass.constructors.size == 1 }
     ?: false
 
-private fun KmClassifier.isString(): Boolean = this is KmClassifier.Class && this.name == "kotlin/String"
-
 private fun isPossibleSingleString(
     kotlinParams: List<JmValueParameter>,
     javaFunction: Executable,