Drop 'requests' external dependency

It was only used in a single method and wasn't really needed.

Signed-off-by: JoeLametta <JoeLametta@users.noreply.github.com>

Dockerfile

@@ -23,7 +23,6 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     python3-mutagen \
     python3-pil \
     python3-pip \
-    python3-requests \
     python3-ruamel.yaml \
     python3-setuptools \
     sox \

README.md

@@ -132,7 +132,6 @@ Whipper relies on the following packages in order to run correctly and provide a
 - [musicbrainzngs](https://pypi.org/project/musicbrainzngs/), for metadata lookup
 - [mutagen](https://pypi.python.org/pypi/mutagen), for tagging support
 - [setuptools](https://pypi.python.org/pypi/setuptools), for installation, plugins support
-- [requests](https://pypi.python.org/pypi/requests), for retrieving AccurateRip database entries
 - [pycdio](https://pypi.python.org/pypi/pycdio/), for drive identification (required for drive offset and caching behavior to be stored in the configuration file).
   - To avoid bugs it's advised to use the most recent `pycdio` version with the corresponding `libcdio` release or, if stuck to old pycdio versions, **0.20**/**0.21** with `libcdio` ≥ **0.90** ≤ **0.94**. All other combinations won't probably work.
 - [discid](https://pypi.org/project/discid/), for calculating Musicbrainz disc id.

requirements.txt

@@ -2,7 +2,6 @@ musicbrainzngs
 mutagen
 pycdio>0.20
 PyGObject
-requests
 ruamel.yaml
 setuptools_scm
 discid

whipper/common/accurip.py

@@ -19,11 +19,12 @@
 # You should have received a copy of the GNU General Public License
 # along with whipper.  If not, see <http://www.gnu.org/licenses/>.
 
-import requests
 import struct
 import whipper
 from os import makedirs
 from os.path import dirname, exists, join
+from urllib.error import URLError, HTTPError
+from urllib.request import urlopen, Request
 
 from whipper.common import directory
 from whipper.program.arc import accuraterip_checksum
@@ -131,15 +132,10 @@ def _download_entry(path):
     UA = "whipper/%s ( https://github.com/whipper-team/whipper )" % whipper.__version__  # noqa: E501
     logger.debug('downloading AccurateRip entry from %s', url)
     try:
-        resp = requests.get(url, headers={'User-Agent': UA})
-    except requests.exceptions.ConnectionError as e:
-        logger.error('error retrieving AccurateRip entry: %r', e)
-        return None
-    if not resp.ok:
-        logger.error('error retrieving AccurateRip entry: %s %s %r',
-                     resp.status_code, resp.reason, resp)
-        return None
-    return resp.content
+        with urlopen(Request(url, headers={'User-Agent': UA})) as resp:
+            return resp.read()
+    except (URLError, HTTPError) as e:
+        logger.error('error retrieving AccurateRip entry: %s', e)
 
 
 def _save_entry(raw_entry, path):