gradle: Small changes

build.gradle.kts

@@ -42,7 +42,7 @@ plugins {
     application
 }
 
-val localGitCommit = try {
+val localGitCommit: String = try {
     val projectPath = rootProject.projectDir.absolutePath
     Grgit.open(mapOf("dir" to projectPath)).head().id
 } catch (_: Exception) {
@@ -96,7 +96,7 @@ subprojects {
             }
         }
 
-        mavenCentral();
+        mavenCentral()
     }
 
     apply<JavaLibraryPlugin>()

buildSrc/build.gradle.kts

@@ -36,8 +36,4 @@ dependencies {
     implementation(gradleApi())
     implementation(group = "net.runelite", name = "fernflower", version = "07082019")
     implementation(group = "org.json", name = "json", version = "20190722")
-}
-
-kotlinDslPluginOptions {
-    experimentalWarning.set(false)
 }