[tools] Remove requests dependency

.github/workflows/analyze.yml

@@ -17,7 +17,6 @@ jobs:
 
       - name: Run gclient sync
         run: |
-          pip3 install requests
           gclient config --name=src --unmanaged https://github.com/${{ github.repository }}
           gclient sync -v --no-history --shallow --nohooks
 

.github/workflows/build.yml

@@ -32,7 +32,6 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y rpm2cpio cpio binutils-${{ matrix.triple }}
-          pip3 install requests
 
       - name: Install depot_tools
         run: |

README.md

@@ -13,9 +13,8 @@ The Flutter embedder for Tizen.
 - [LLVM](https://apt.llvm.org) (10 or later)
   - `sudo apt install clang-12`
 - Additional dependencies
-  - `sudo apt install git python3 python3-pip rpm2cpio cpio`
+  - `sudo apt install git python3 rpm2cpio cpio`
   - `sudo apt install binutils-arm-linux-gnueabi binutils-aarch64-linux-gnu binutils-i686-linux-gnu`
-  - `pip3 install requests`
 
 ### Environment setup
 

tools/download_engine.py

@@ -3,7 +3,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import requests
 import shutil
 import sys
 import urllib.request
@@ -22,11 +21,13 @@ def main():
   if stamp_file.is_file():
     stamp = stamp_file.read_text().strip()
 
-  version = ''
   # The GitHub REST API cannot be used in the company network due to an
   # "API rate limit exceeded" error. The following is a workaround.
-  request = requests.get('{}/latest'.format(github_url))
-  redirected_url = request.url
+  redirected_url = ''
+  with urllib.request.urlopen('{}/latest'.format(github_url)) as response:
+    redirected_url = response.geturl()
+
+  version = ''
   if '/tag/' in redirected_url:
     version = redirected_url.split('/tag/')[-1]