deleted manual build file

clean up since b/245731902 is already generating BUILD file in bp2build

Bug: 245731902
Change-Id: I45b26d672b84ac34b0363b6cf77833c689e7f7f1
Test: built codegen_cli with bazel

tools/codegen/Android.bp

@@ -9,7 +9,7 @@ package {
 
 java_binary_host {
     name: "codegen_cli",
-    manifest: "manifest.txt",
+    main_class: "com.android.codegen.MainKt",
     srcs: [
         "src/**/*.kt",
     ],

tools/codegen/BUILD.bazel

@@ -1,21 +0,0 @@
-# TODO(b/245731902): auto-generate these with bp2build.
-load("@rules_kotlin//kotlin:jvm_library.bzl", "kt_jvm_library")
-
-java_binary(
-    name = "codegen_cli",
-    main_class = "com.android.codegen.MainKt",
-    runtime_deps = [
-        ":codegen_cli_kt_lib",
-    ],
-)
-
-kt_jvm_library(
-    name = "codegen_cli_kt_lib",
-    srcs = glob(["src/**/*.kt"]),
-    deps = ["//external/javaparser"],
-)
-
-kt_jvm_library(
-    name = "codegen-version-info",
-    srcs = glob(["src/**/SharedConstants.kt"]),
-)

tools/codegen/manifest.txt

@@ -1 +0,0 @@
-Main-class: com.android.codegen.MainKt