Rollback of commit 4b0832808ab1260ba75c08342ec359cfdc2c313a.

*** Reason for rollback ***

Breaking googlemac targets in nightly

*** Original change description ***

Add -DNS_BLOCK_ASSERTIONS=1 to objc builds and to c++ builds using the OSX crosstool.

--
MOS_MIGRATED_REVID=133736793

src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
index 4726669..734f546 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcConfiguration.java
@@ -50,8 +50,8 @@
 
   @VisibleForTesting
   static final ImmutableList<String> OPT_COPTS =
-      ImmutableList.of("-Os", "-DNDEBUG=1", "-Wno-unused-variable", "-Winit-self", "-Wno-extra",
-          "-DNS_BLOCK_ASSERTIONS=1");
+      ImmutableList.of(
+          "-Os", "-DNDEBUG=1", "-Wno-unused-variable", "-Winit-self", "-Wno-extra");
 
   private final DottedVersion iosMinimumOs;
   private final DottedVersion iosSimulatorVersion;