chore(buildSrc): remove unused generator dependencies

The generator plugin was long ago moved to its own
included build, but the dependencies weren't
removed from buildSrc

Author: EdricChan03

buildSrc/build.gradle.kts

@@ -1,15 +1,8 @@
 plugins {
     `kotlin-dsl`
-    kotlin("plugin.serialization") version embeddedKotlinVersion
 }
 
 dependencies {
-    implementation(libs.ktor.client.core)
-    implementation(libs.ktor.client.cio)
-    implementation(libs.ktor.client.contentNegotiation)
-    implementation(libs.ktor.serialization.kotlinx.json)
-    implementation(libs.kotlinx.serialization.json)
-
     // For precompiled scripts
     implementation(libs.dokka.plugin)
     implementation(libs.kotlin.mpp.plugin)