libbinder: remove 32-bit ABI support

This was an old userspace ABI, but we've encouraged all
platforms to move to a consistent ABI, regardless of
bitness of the device. This corresponds to a kernel
config option that we started requiring not be set
in Android P.

After this, the build system still needs to have this support
removed.

Bug: 232423610
Test: boot cf
Change-Id: Iff5997f910d86c73bbd6502ec393434d248cdcd5
diff --git a/libs/binder/tests/binderDriverInterfaceTest.cpp b/libs/binder/tests/binderDriverInterfaceTest.cpp
index 8cc3054..cf23a46 100644
--- a/libs/binder/tests/binderDriverInterfaceTest.cpp
+++ b/libs/binder/tests/binderDriverInterfaceTest.cpp
@@ -25,8 +25,6 @@
 #include <sys/mman.h>
 #include <poll.h>
 
-#include "binderAbiHelper.h"
-
 #define BINDER_DEV_NAME "/dev/binder"
 
 testing::Environment* binder_env;
@@ -362,8 +360,7 @@
     binderTestReadEmpty();
 }
 
-int main(int argc, char **argv) {
-    ExitIfWrongAbi();
+int main(int argc, char** argv) {
     ::testing::InitGoogleTest(&argc, argv);
 
     binder_env = AddGlobalTestEnvironment(new BinderDriverInterfaceTestEnv());