Revert "dexopt: Fix target-sdk-version argument creation"

This reverts commit d458a4f956193afdb52138606f6e61fc00b363bf.

Reason for revert: Breaks tests and manual compile

Bug: 124771423
Change-Id: Icb0fba371ffdc7464f8df21c6b92c7d7faf568f8
Test: N/A
diff --git a/cmds/installd/dexopt.cpp b/cmds/installd/dexopt.cpp
index 15b619a..852aa79 100644
--- a/cmds/installd/dexopt.cpp
+++ b/cmds/installd/dexopt.cpp
@@ -366,7 +366,7 @@
         std::string dex2oat_image_fd;
         std::string target_sdk_version_arg;
         if (target_sdk_version != 0) {
-            target_sdk_version_arg = StringPrintf("-Xtarget-sdk-version:%d", target_sdk_version);
+            StringPrintf("-Xtarget-sdk-version:%d", target_sdk_version);
         }
         std::string class_loader_context_arg;
         if (class_loader_context != nullptr) {