Remove portable.

Change-Id: I3bf3250fa866fd2265f1b115d52fa5dedc48a7fc
diff --git a/compiler/trampolines/trampoline_compiler.cc b/compiler/trampolines/trampoline_compiler.cc
index cb07ffa..385d134 100644
--- a/compiler/trampolines/trampoline_compiler.cc
+++ b/compiler/trampolines/trampoline_compiler.cc
@@ -40,8 +40,7 @@
       __ LoadFromOffset(kLoadWord, IP, R0, JNIEnvExt::SelfOffset().Int32Value());
       __ LoadFromOffset(kLoadWord, PC, IP, offset.Int32Value());
       break;
-    case kPortableAbi:  // R9 holds Thread*.
-    case kQuickAbi:  // Fall-through.
+    case kQuickAbi:  // R9 holds Thread*.
       __ LoadFromOffset(kLoadWord, PC, R9, offset.Int32Value());
   }
   __ bkpt(0);
@@ -75,8 +74,7 @@
                 Arm64ManagedRegister::FromXRegister(IP0));
 
       break;
-    case kPortableAbi:  // X18 holds Thread*.
-    case kQuickAbi:  // Fall-through.
+    case kQuickAbi:  // X18 holds Thread*.
       __ JumpTo(Arm64ManagedRegister::FromXRegister(TR), Offset(offset.Int32Value()),
                 Arm64ManagedRegister::FromXRegister(IP0));
 
@@ -106,8 +104,7 @@
       __ LoadFromOffset(kLoadWord, T9, A0, JNIEnvExt::SelfOffset().Int32Value());
       __ LoadFromOffset(kLoadWord, T9, T9, offset.Int32Value());
       break;
-    case kPortableAbi:  // S1 holds Thread*.
-    case kQuickAbi:  // Fall-through.
+    case kQuickAbi:  // S1 holds Thread*.
       __ LoadFromOffset(kLoadWord, T9, S1, offset.Int32Value());
   }
   __ Jr(T9);