gnu: beets: Update to 1.4.9.

* gnu/packages/music.scm (beets): Update to 1.4.9.
[source]: Remove patch.
[arguments]: Remove more Python 3.7 compatibility fixes.
* gnu/packages/patches/beets-python-3.7-fix.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu/local.mk

@@ -711,7 +711,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/bash-completion-directories.patch	\
   %D%/packages/patches/bastet-change-source-of-unordered_set.patch	\
   %D%/packages/patches/bazaar-CVE-2017-14176.patch		\
-  %D%/packages/patches/beets-python-3.7-fix.patch		\
   %D%/packages/patches/beignet-correct-file-names.patch		\
   %D%/packages/patches/benchmark-unbundle-googletest.patch	\
   %D%/packages/patches/biber-fix-encoding-write.patch		\

gnu/packages/music.scm

@@ -2813,14 +2813,13 @@ (define-public instantmusic
 (define-public beets
   (package
     (name "beets")
-    (version "1.4.7")
+    (version "1.4.9")
     (source (origin
               (method url-fetch)
               (uri (pypi-uri "beets" version))
-              (patches (search-patches "beets-python-3.7-fix.patch"))
               (sha256
                (base32
-                "0w3gz69s9gf5ih69d4sddgh7ndj7658m621bp742zldvjakdncrs"))))
+                "0m40rjimvfgy1dv04p8f8d5dvi2855v4ix99a9xr900cmcn476yj"))))
     (build-system python-build-system)
     (arguments
      `(#:phases
@@ -2829,12 +2828,6 @@ (define-public beets
            (lambda _
              (setenv "HOME" (string-append (getcwd) "/tmp"))
              #t))
-         (add-after 'unpack 'make-python3.7-compatible
-           (lambda _
-             ;; See <https://github.com/beetbox/beets/issues/2978>.
-             (substitute* "beets/autotag/hooks.py"
-              (("re\\._pattern_type") "re.Pattern"))
-             #t))
          (replace 'check
            (lambda _
              (invoke "nosetests" "-v"))))))

gnu/packages/patches/beets-python-3.7-fix.patch

@@ -1,57 +0,0 @@
-Fix compatibility issue with Python 3.7:
-
-https://github.com/beetbox/beets/issues/2978
-
-Patch copied from upstream source repository:
-
-https://github.com/beetbox/beets/commit/15d44f02a391764da1ce1f239caef819f08beed8
-
-From 15d44f02a391764da1ce1f239caef819f08beed8 Mon Sep 17 00:00:00 2001
-From: Adrian Sampson <adrian@radbox.org>
-Date: Sun, 22 Jul 2018 12:34:19 -0400
-Subject: [PATCH] Fix Python 3.7 compatibility (#2978)
-
----
- beets/autotag/hooks.py | 8 +++++++-
- docs/changelog.rst     | 2 ++
- 2 files changed, 9 insertions(+), 1 deletion(-)
-
-diff --git a/beets/autotag/hooks.py b/beets/autotag/hooks.py
-index 3615a9333..1c62a54c5 100644
---- a/beets/autotag/hooks.py
-+++ b/beets/autotag/hooks.py
-@@ -31,6 +31,12 @@
- 
- log = logging.getLogger('beets')
- 
-+# The name of the type for patterns in re changed in Python 3.7.
-+try:
-+    Pattern = re._pattern_type
-+except AttributeError:
-+    Pattern = re.Pattern
-+
- 
- # Classes used to represent candidate options.
- 
-@@ -433,7 +439,7 @@ def _eq(self, value1, value2):
-         be a compiled regular expression, in which case it will be
-         matched against `value2`.
-         """
--        if isinstance(value1, re._pattern_type):
-+        if isinstance(value1, Pattern):
-             return bool(value1.match(value2))
-         return value1 == value2
- 
-#diff --git a/docs/changelog.rst b/docs/changelog.rst
-#index be6de2904..d487f31f5 100644
-#--- a/docs/changelog.rst
-#+++ b/docs/changelog.rst
-#@@ -19,6 +19,8 @@ New features:
-# 
-# Fixes:
-# 
-#+* Fix compatibility Python 3.7 and its change to a name in the ``re`` module.
-#+  :bug:`2978`
-# * R128 normalization tags are now properly deleted from files when the values
-#   are missing.
-#   Thanks to :user:`autrimpo`.