Revert "Upgrade Gradle and add iOS targets"

This reverts commit 06dc507590.

build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
 
 val PUBLISH_GROUP_ID = "com.github.adriankuta"
 val PUBLISH_ARTIFACT_ID = "tree-structure"
-val PUBLISH_VERSION = "3.1.0"
+val PUBLISH_VERSION = "3.0.2"
 
 val secretFile = File(rootProject.rootDir, "local.properties")
 if (secretFile.exists()) {
@@ -118,12 +118,6 @@ kotlin {
             }
         }
     }
-
-    // Add iOS targets
-    iosX64()
-    iosArm64()
-    iosSimulatorArm64()
-
     val hostOs = System.getProperty("os.name")
     val isMingwX64 = hostOs.startsWith("Windows")
     val nativeTarget = when {
@@ -133,6 +127,7 @@ kotlin {
         else -> throw GradleException("Host OS is not supported in Kotlin/Native.")
     }
 
+
     sourceSets {
         val commonMain by getting
         val commonTest by getting {
@@ -150,19 +145,5 @@ kotlin {
         val jsTest by getting
         val nativeMain by getting
         val nativeTest by getting
-
-        // Shared iOS source sets
-        val iosMain by creating {
-            dependsOn(commonMain)
-        }
-        val iosTest by creating {
-            dependsOn(commonTest)
-        }
-        val iosX64Main by getting { dependsOn(iosMain) }
-        val iosArm64Main by getting { dependsOn(iosMain) }
-        val iosSimulatorArm64Main by getting { dependsOn(iosMain) }
-        val iosX64Test by getting { dependsOn(iosTest) }
-        val iosArm64Test by getting { dependsOn(iosTest) }
-        val iosSimulatorArm64Test by getting { dependsOn(iosTest) }
     }
 }