Remove unused dexpreopt install path function

`odexOnSystemOther` (presumably) returns a boolean indicating whether
.odex/.vdex files should be installed in system_other.img. The
installation location logic is now colocated in build/soong/dexpreopt
package, so we can delete this unused function.

Test: go build ./java
Change-Id: Ibd1a3a0b945f8d7953baad05cbaf65cb58b5a05a
diff --git a/java/dexpreopt.go b/java/dexpreopt.go
index 832b850..4fe3664 100644
--- a/java/dexpreopt.go
+++ b/java/dexpreopt.go
@@ -312,10 +312,6 @@
 	dexpreopt.RegisterToolDeps(ctx)
 }
 
-func (d *dexpreopter) odexOnSystemOther(ctx android.ModuleContext, libName string, installPath android.InstallPath) bool {
-	return dexpreopt.OdexOnSystemOtherByName(libName, android.InstallPathToOnDevicePath(ctx, installPath), dexpreopt.GetGlobalConfig(ctx))
-}
-
 // Returns the install path of the dex jar of a module.
 //
 // Do not rely on `ApexInfo.ApexVariationName` because it can be something like "apex1000", rather