Remove unused proto file

Added by mistake in I7e0e50480118d393ae2a0e12c8a62dcd1b30aedd.

Test: m
Change-Id: I57829933c34db7a405d6255ddac111f7005b1676
diff --git a/derive_sdk/sdk_extensions.proto b/derive_sdk/sdk_extensions.proto
deleted file mode 100644
index e2929c2..0000000
--- a/derive_sdk/sdk_extensions.proto
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-syntax = "proto3";
-package com.android.sdkext.proto;
-
-option java_outer_classname = "VersionRequirements";
-option optimize_for = LITE_RUNTIME;
-
-// All the modules that can be used for version requirements.
-enum SdkModule {
-  // R modules
-  IPSEC = 1;
-  MEDIA = 2;
-  MEDIA_PROVIDER = 3;
-  PERMISSIONS = 4;
-  SDK_EXTENSIONS = 5;
-  STATSD = 6;
-  TETHERING = 7;
-}
-
-// A single extension version.
-message ExtensionVersion {
-  message ModuleRequirement {
-    SdkModule module = 1;
-    int32 version = 2;
-  }
-  repeated ModuleRequirement requirements = 1
-}
-
-// All the defined extension versions.
-message ExtensionVersions {
-  repeated ExtensionVersion versions = 1;
-}