Revert "Merge pull request #80695 from mikeash/move-priority-escalation-define"

This reverts commit 1e96466, reversing
changes made to cb0e1da.

Author: jrflat

include/swift/ABI/Task.h

@@ -29,17 +29,6 @@
 #include "bitset"
 #include "queue" // TODO: remove and replace with our own mpsc
 
-// Does the runtime provide priority escalation support?
-#ifndef SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION
-#if SWIFT_CONCURRENCY_ENABLE_DISPATCH && \
-    __has_include(<dispatch/swift_concurrency_private.h>) && __APPLE__ && \
-    (defined(__arm64__) || defined(__x86_64__))
-#define SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION 1
-#else
-#define SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION 0
-#endif
-#endif /* SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION */
-
 namespace swift {
 class AsyncTask;
 class AsyncContext;

include/swift/Runtime/Concurrency.h

@@ -45,6 +45,17 @@
 #define SWIFT_CONCURRENCY_ENABLE_DISPATCH 0
 #endif
 
+// Does the runtime provide priority escalation support?
+#ifndef SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION
+#if SWIFT_CONCURRENCY_ENABLE_DISPATCH && \
+    __has_include(<dispatch/swift_concurrency_private.h>) && __APPLE__ && \
+    (defined(__arm64__) || defined(__x86_64__))
+#define SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION 1
+#else
+#define SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION 0
+#endif
+#endif /* SWIFT_CONCURRENCY_ENABLE_PRIORITY_ESCALATION */
+
 namespace swift {
 class DefaultActor;
 class TaskOptionRecord;