Revert "Add versions property to libc_hwasan stubs"

This reverts commit fe2907c133c5ceaf8977032a55d0f799d8336b42.

Reason for revert: Breaks bionic-unit-tests b/278795547. Since the original mixed build change is being reverted for now (aosp/2547450), fe2907c133c5ceaf8977032a55d0f799d8336b42 is not needed immediately

Change-Id: I2deb06a38322bf8296d4721c840f06f35b757177
diff --git a/libc/Android.bp b/libc/Android.bp
index ec9ca0c..f5f5f7c 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1863,7 +1863,6 @@
     // symlink logic in soong.
     stubs: {
         symbol_file: "libc.map.txt",
-        versions: ["current"],
     },
     native_bridge_supported: false,
     // It is never correct to depend on this directly. This is only