Remove remaining thrift content from main repo

tools/grift/Dockerfile

-# Copyright 2016 gRPC authors.
-#
-# 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.
-
-FROM ubuntu:14.04
-
-RUN apt-get update && \
-  apt-get install -y \
-  git build-essential \
-  pkg-config flex \
-  bison \
-  libkrb5-dev \
-  libsasl2-dev \
-  libnuma-dev \
-  pkg-config \
-  libssl-dev \
-  autoconf libtool \
-  cmake \
-  libiberty-dev \
-  g++ unzip \
-  curl make automake libtool libboost-dev
-
-# Configure git
-RUN git config --global user.name "Jenkins" && \
-  git config --global user.email "jenkins@grpc"
-
-# Clone gRPC
-RUN git clone https://github.com/grpc/grpc
-
-# Update Submodules
-RUN cd grpc && git submodule update --init
-
-# Install protobuf
-RUN cd grpc/third_party/protobuf && ./autogen.sh && ./configure && \
-  make -j && make check -j && make install && ldconfig
-
-# Install gRPC
-RUN cd grpc && make -j && make install
-
-# Install thrift
-RUN cd grpc/third_party/thrift && git am --signoff < ../../tools/grift/grpc_plugins_generator.patch && \
-  ./bootstrap.sh && ./configure && make -j && make install
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tools/grift/README.md

-# Documentation
-
-grift is integration of [Apache Thrift](https://github.com/apache/thrift.git) Serializer with gRPC.
-
-This integration allows you to use grpc to send thrift messages in C++ and java.
-
-grift uses Compact Protocol to serialize thrift messages. 
-
-## generating grpc plugins for thrift services
-
-### C++
-```sh
- $ thrift --gen cpp <thrift-file>
-```
-
-### Java
-```sh
- $ thrift --gen java <thrift-file>
-```
-
-# Installation
-
-Before Installing thrift make sure to apply this [patch](grpc_plugins_generator.patch) to third_party/thrift.
-Go to third_party/thrift and follow the [INSTALLATION](https://github.com/apache/thrift.git) instructions to install thrift with commit id bcad91771b7f0bff28a1cac1981d7ef2b9bcef3c.
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