Remove gitonium plugin from subprojects

Author: Virtlink

core/spoofax.compiler.gradle.spoofax2/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
   id("org.metaborg.gradle.config.kotlin-gradle-plugin")
-  id("org.metaborg.gitonium")
   kotlin("jvm")
   kotlin("kapt")
   id("org.gradle.kotlin.kotlin-dsl") // Same as `kotlin-dsl`, but without version, which is already set in root project.

core/spoofax.compiler.gradle/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
   id("org.metaborg.gradle.config.kotlin-gradle-plugin")
-  id("org.metaborg.gitonium")
   kotlin("jvm")
   kotlin("kapt")
   id("org.gradle.kotlin.kotlin-dsl") // Same as `kotlin-dsl`, but without version, which is already set in root project.

lwb/spoofax.lwb.compiler.gradle/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
   id("org.metaborg.gradle.config.kotlin-gradle-plugin")
-  id("org.metaborg.gitonium")
   kotlin("jvm")
   kotlin("kapt")
   id("org.gradle.kotlin.kotlin-dsl") // Same as `kotlin-dsl`, but without version, which is already set in root project.