Remove obsolete 'neon' feature.

arm32 has had neon for years now, and the last explicit references to this have been removed.

Change-Id: Ia3f9f8c6ba906d34e43c9c39ab01e1b96d164cf4
diff --git a/bazel/configurability.go b/bazel/configurability.go
index 2c9a536..3a65614 100644
--- a/bazel/configurability.go
+++ b/bazel/configurability.go
@@ -100,9 +100,7 @@
 	// Copy of archFeatures from android/arch_list.go because the bazel
 	// package can't access the android package
 	archFeatures := map[string][]string{
-		"arm": {
-			"neon",
-		},
+		"arm": {},
 		"arm64": {
 			"dotprod",
 		},