[build-logic] Drop redundant definition of getAndroidRuntimeJar()

This is also defined in global-conventions.gradle.

build-logic/src/main/groovy/org.igniterealtime.smack.java-common-conventions.gradle

@@ -323,17 +323,6 @@ def getGitCommit() {
 	gitCommit
 }
 
-def getAndroidRuntimeJar() {
-	def androidHome = new File("$System.env.ANDROID_HOME")
-	if (!androidHome.isDirectory()) throw new Exception("ANDROID_HOME not found or set")
-	def androidJar = new File("$androidHome/platforms/android-$smackMinAndroidSdk/android.jar")
-	if (androidJar.isFile()) {
-		return androidJar
-	} else {
-		throw new Exception("Can't find android.jar for $smackMinAndroidSdk API. Please install corresponding SDK platform package")
-	}
-}
-
 def readVersionFile() {
 	def versionFile = new File(rootDir, 'version')
 	if (!versionFile.isFile()) {