Removes mavenPublishing block from testing-lib (#132)

Author: hugomd

testing-lib/build.gradle.kts

@@ -1,7 +1,6 @@
 plugins {
   id("java-library")
   id("org.jetbrains.kotlin.jvm")
-  id("com.vanniktech.maven.publish")
 }
 
 repositories {
@@ -21,10 +20,6 @@ java {
   withSourcesJar()
 }
 
-mavenPublishing {
-  configure(com.vanniktech.maven.publish.KotlinJvm())
-}
-
 dependencies {
   implementation(project(":lib"))
   implementation(libs.arrowCore)