Remove unused code for patching oat files.

patchoat is now only used for patching images. It no longer needs to
support patching of non-PIC oat files. This change removes code from
patchoat that was specific to patching of non-PIC oat files.

Bug: 33192586
Test: m test-art-host
Test: device boots
Change-Id: I8918a708e441493a21f25d537ed0b74748bb9641
diff --git a/runtime/dex2oat_environment_test.h b/runtime/dex2oat_environment_test.h
index b0c4597..8b1b5a3 100644
--- a/runtime/dex2oat_environment_test.h
+++ b/runtime/dex2oat_environment_test.h
@@ -160,7 +160,7 @@
   // image at GetImageLocation(). This is used for testing mismatched
   // image checksums in the oat_file_assistant_tests.
   std::string GetImageLocation2() const {
-    return GetImageDirectory() + "/core-npic.art";
+    return GetImageDirectory() + "/core-multi.art";
   }
 
   std::string GetDexSrc1() const {