Remove mterp "alternate" opcode handlers.

They are currently unused and I don't have plans to use them.

The alternate table made it possible to enable extra mterp checks.
However, it is possible to move the debug checks to the main path.

Test: test.py -b -r --interpreter -t 001-HelloWorld
Change-Id: I45a39ec73abaefaecf5b8c636f3f9d519a0a8bb0
diff --git a/runtime/oat.h b/runtime/oat.h
index 963725a..5c5a02d 100644
--- a/runtime/oat.h
+++ b/runtime/oat.h
@@ -32,8 +32,8 @@
 class PACKED(4) OatHeader {
  public:
   static constexpr uint8_t kOatMagic[] = { 'o', 'a', 't', '\n' };
-  // Last oat version changed reason: Remove PIC option from oat files.
-  static constexpr uint8_t kOatVersion[] = { '1', '6', '2', '\0' };
+  // Last oat version changed reason: Remove interpreter alt tables.
+  static constexpr uint8_t kOatVersion[] = { '1', '6', '3', '\0' };
 
   static constexpr const char* kImageLocationKey = "image-location";
   static constexpr const char* kDex2OatCmdLineKey = "dex2oat-cmdline";