adb: delete vestigial SHELL_EXIT_NOTIFY_FD.

There exists no path through which a value other than -1 can be written
to the SHELL_EXIT_NOTIFY_FD.

Test: adb_test
Test: adbd_test
Test: python test_device.py
Change-Id: I0630c302ba06bc76917f0445aea75d2dbe1dc865

1 files changed, 0 insertions, 4 deletions

diff --git a/adb.h b/adb.h
index a6d04631..c74fa99a 100644
--- a/adb.h
+++ b/adb.h
@@ -196,10 +196,6 @@ ConnectionState connection_state(atransport* t);
 
 extern const char* adb_device_banner;
 
-#if !ADB_HOST
-extern int SHELL_EXIT_NOTIFY_FD;
-#endif  // !ADB_HOST
-
 #define CHUNK_SIZE (64 * 1024)
 
 #if !ADB_HOST