Remove downloadSources property

It is already true by default

Author: RedNesto

gradle.properties

@@ -25,7 +25,6 @@ ideaVersion = 2024.2
 ideaVersionName = 2024.2
 
 coreVersion = 1.8.1
-org.jetbrains.intellij.platform.downloadSources=true
 
 # Silences a build-time warning because we are bundling our own kotlin library
 kotlin.stdlib.default.dependency = false