simpleperf: remove unneeded file.

Change-Id: I7cf5134834882dfe34ace94c0309f59012de4ecd
diff --git a/simpleperf/environment_fake.cpp b/simpleperf/environment_fake.cpp
deleted file mode 100644
index fdcf814..0000000
--- a/simpleperf/environment_fake.cpp
+++ /dev/null
@@ -1,26 +0,0 @@
-/*
- * Copyright (C) 2015 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.
- */
-
-// Add fake functions to build successfully on non-linux environments.
-#include "environment.h"
-
-bool ProcessKernelSymbols(const std::string&, std::function<bool(const KernelSymbol&)>) {
-  return false;
-}
-
-bool GetKernelBuildId(BuildId*) {
-  return false;
-}