Build scripts: get rid of isJetBrainsNetwork property in build script

build/dependencies/build.gradle

@@ -36,20 +36,6 @@ apply plugin: 'base'
 group 'com.intellij.build'
 version '1.0'
 
-try {
-  project.ext.inJetBrainsNetwork = InetAddress.getByName("repo.labs.intellij.net").isReachable(1000)
-  if (!project.ext.inJetBrainsNetwork && org.gradle.internal.os.OperatingSystem.current().isWindows()) {
-    project.ext.inJetBrainsNetwork = Runtime.getRuntime().exec("ping -n 1 repo.labs.intellij.net").waitFor() == 0
-  }
-  if (!project.ext.inJetBrainsNetwork) {
-    logger.info('repo.labs.intellij.net is not reachable')
-  }
-}
-catch (UnknownHostException e) {
-  logger.info('repo.labs.intellij.net is not reachable', e)
-  project.ext.inJetBrainsNetwork = false
-}
-
 apply from: 'setupJdk.gradle'
 apply from: 'setupJbre.gradle'
 apply from: 'setupKotlin.gradle'

build/dependencies/setupJdk.gradle

@@ -37,7 +37,7 @@ task downloadJdk18 {
   doLast {
     logger.info("Downloading up JDK 1.8 to compile (using $DependenciesBuildUtils.jdkRepo repo)")
     download {
-      src "$DependenciesBuildUtils.jdkRepo/intellij-jdk/${artifactName}"
+      src "$DependenciesBuildUtils.jdkRepo/${artifactName}"
       dest outputFile
       onlyIfNewer true
     }