Delete an unused maven publishing plugin

Author: jacksever

gradle/libs.versions.toml

@@ -30,4 +30,3 @@ gradlePlugin-mavenPublish = { group = "com.vanniktech", name = "gradle-maven-pub
 com-google-ksp = { id = "com.google.devtools.ksp", version.ref = "com-google-ksp" }
 org-jetbrains-kotlin-jvm = { id = "org.jetbrains.kotlin.jvm", version.ref = "org-jetbrains-kotlin" }
 org-jetbrains-kotlin-multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "org-jetbrains-kotlin" }
-com-vanniktech-maven-publish = { id = "com.vanniktech.maven.publish", version.ref = "com-vanniktech-maven-publish" }