Remove patchoat.

Test: m test-art-host-gtest
Test: testrunner.py --host --optimizing
Test: Pixel 2 XL boots.
Bug: 77856493
Change-Id: I6686ce9d23e02aa8b8ef4081b302dbd860d07718
diff --git a/runtime/parsed_options.cc b/runtime/parsed_options.cc
index 4d16eb5..2e495cc 100644
--- a/runtime/parsed_options.cc
+++ b/runtime/parsed_options.cc
@@ -751,7 +751,7 @@
   UsageMessage(stream, "  -Xcompiler:filename\n");
   UsageMessage(stream, "  -Xcompiler-option dex2oat-option\n");
   UsageMessage(stream, "  -Ximage-compiler-option dex2oat-option\n");
-  UsageMessage(stream, "  -Xpatchoat:filename\n");
+  UsageMessage(stream, "  -Xpatchoat:filename (obsolete, ignored)\n");
   UsageMessage(stream, "  -Xusejit:booleanvalue\n");
   UsageMessage(stream, "  -Xjitinitialsize:N\n");
   UsageMessage(stream, "  -Xjitmaxsize:N\n");