Keep only base/extractor.[cc|h].

third_party/lzma/v4_65/build.scons

Index: third_party/lzma/v4_65/build.scons
diff --git a/third_party/lzma/v4_65/build.scons b/third_party/lzma/v4_65/build.scons
deleted file mode 100644
index eb3a64b183038025a771c754cac6278a9d84b19f..0000000000000000000000000000000000000000
--- a/third_party/lzma/v4_65/build.scons
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/usr/bin/python2.4
-#
-# Copyright 2009 Google Inc.
-#
-# 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.
-# ========================================================================
-
-Import('env')
-
-local_env = env.Clone()
-local_env.FilterOut(CCFLAGS=['/RTC1'])
-
-local_env.ComponentLibrary(
-    lib_name='lzma',
-    source=[
-        'files/C/Bcj2.c',
-        'files/C/Bra86.c',
-        'files/C/LzmaDec.c',
-    ],
-)