Revert "Dexpreopt soong modules inside soong"

This reverts commit 29ff88741e.

Test: none
Bug: 119412419

dexpreopt/Android.bp

@@ -1,15 +0,0 @@
-bootstrap_go_package {
-    name: "soong-dexpreopt",
-    pkgPath: "android/soong/dexpreopt",
-    srcs: [
-        "config.go",
-        "dexpreopt.go",
-        "script.go",
-    ],
-    testSrcs: [
-        "dexpreopt_test.go",
-    ],
-    deps: [
-        "blueprint-pathtools",
-    ],
-}