IDEA-163208: remove obsolete registry key

also add description for 'ide.mac.touchbar.use'

platform/platform-impl/src/com/intellij/ui/mac/touchbar/NST.java

@@ -21,18 +21,16 @@ import java.util.Map;
 public class NST {
   private static final Logger LOG = Logger.getInstance(NST.class);
   private static final String ourRegistryKeyTouchbar = "ide.mac.touchbar.use";
-  private static final String ourRegistryKeyDoCheckEnv = "ide.mac.touchbar.check.env";
   private static final NSTLibrary ourNSTLibrary; // NOTE: JNA is stateless (doesn't have any limitations of multi-threaded use)
 
   static {
     final boolean isSystemSupportTouchbar = SystemInfo.isMac && SystemInfo.isOsVersionAtLeast("10.12.2");
     final boolean isRegistryKeyEnabled = Registry.is(ourRegistryKeyTouchbar, false);
-    final boolean doCheckEnv = Registry.is(ourRegistryKeyDoCheckEnv, true);
     NSTLibrary lib = null;
     if (
       isSystemSupportTouchbar
       && isRegistryKeyEnabled
-      && (!doCheckEnv || SystemSettingsTouchBar.isTouchBarServerRunning())
+      && SystemSettingsTouchBar.isTouchBarServerRunning()
     ) {
       try {
         UrlClassLoader.loadPlatformLibrary("nst");

platform/util/resources/misc/registry.properties

@@ -1297,7 +1297,7 @@ markdown.clear.cache.interval=600000
 ide.mac.new.color.picker=false
 
 ide.mac.touchbar.use = true
-ide.mac.touchbar.check.env = true
+ide.mac.touchbar.use.description=Enable MacBook Touch Bar support
 
 trace.focus.on.app.activation=false
 trace.focus.on.app.activation.description=Focus tracing on application activation and deactivation