gh-37312: `sage.plot.animate`: Use FFmpeg.absolute_filename; `sage.features`: Remove deprecated methods
    
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- Fixes #35255

Removes methods deprecated in:
- #31292 (2022)
- #33114 (2022)
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URL: #37312
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee

Author: Release Manager

src/sage/features/__init__.py

@@ -606,7 +606,7 @@ class FileFeature(Feature):
     To work with the file described by the feature, use the method :meth:`absolute_filename`.
     A :class:`FeatureNotPresentError` is raised if the file cannot be found::
 
-        sage: Executable(name="does-not-exist", executable="does-not-exist-xxxxyxyyxyy").absolute_path()
+        sage: Executable(name="does-not-exist", executable="does-not-exist-xxxxyxyyxyy").absolute_filename()
         Traceback (most recent call last):
         ...
         sage.features.FeatureNotPresentError: does-not-exist is not available.
@@ -654,32 +654,6 @@ def absolute_filename(self) -> str:
         # the distribution sagemath-environment.
         raise NotImplementedError
 
-    def absolute_path(self):
-        r"""
-        Deprecated alias for :meth:`absolute_filename`.
-
-        Deprecated to make way for a method of this name returning a ``Path``.
-
-        EXAMPLES::
-
-            sage: from sage.features import Executable
-            sage: Executable(name="sh", executable="sh").absolute_path()
-            doctest:warning...
-            DeprecationWarning: method absolute_path has been replaced by absolute_filename
-            See https://github.com/sagemath/sage/issues/31292 for details.
-            '/...bin/sh'
-        """
-        try:
-            from sage.misc.superseded import deprecation
-        except ImportError:
-            # The import can fail because sage.misc.superseded is provided by
-            # the distribution sagemath-objects, which is not an
-            # install-requires of the distribution sagemath-environment.
-            pass
-        else:
-            deprecation(31292, 'method absolute_path has been replaced by absolute_filename')
-        return self.absolute_filename()
-
 
 class Executable(FileFeature):
     r"""
@@ -764,7 +738,7 @@ def absolute_filename(self) -> str:
 
         A :class:`FeatureNotPresentError` is raised if the file cannot be found::
 
-            sage: Executable(name="does-not-exist", executable="does-not-exist-xxxxyxyyxyy").absolute_path()
+            sage: Executable(name="does-not-exist", executable="does-not-exist-xxxxyxyyxyy").absolute_filename()
             Traceback (most recent call last):
             ...
             sage.features.FeatureNotPresentError: does-not-exist is not available.

src/sage/features/join_feature.py

@@ -98,36 +98,6 @@ def _is_present(self):
                 return test
         return FeatureTestResult(self, True)
 
-    def is_functional(self):
-        r"""
-        Test whether the join feature is functional.
-
-        This method is deprecated. Use :meth:`Feature.is_present` instead.
-
-        EXAMPLES::
-
-            sage: from sage.features.latte import Latte
-            sage: Latte().is_functional()  # optional - latte_int
-            doctest:warning...
-            DeprecationWarning: method JoinFeature.is_functional; use is_present instead
-            See https://github.com/sagemath/sage/issues/33114 for details.
-            FeatureTestResult('latte_int', True)
-        """
-        try:
-            from sage.misc.superseded import deprecation
-        except ImportError:
-            # The import can fail because sage.misc.superseded is provided by
-            # the distribution sagemath-objects, which is not an
-            # install-requires of the distribution sagemath-environment.
-            pass
-        else:
-            deprecation(33114, 'method JoinFeature.is_functional; use is_present instead')
-        for f in self._features:
-            test = f.is_functional()
-            if not test:
-                return test
-        return FeatureTestResult(self, True)
-
     def hide(self):
         r"""
         Hide this feature and all its joined features.

src/sage/plot/animate.py

@@ -1023,8 +1023,9 @@ def ffmpeg(self, savefile=None, show_path=False, output_format=None,
         # afterwards.  Hence 'early_options' and 'ffmpeg_options'
         # The `-nostdin` is needed to avoid the command to hang, see
         # https://stackoverflow.com/questions/16523746/ffmpeg-hangs-when-run-in-background
-        cmd = 'cd {}; ffmpeg -nostdin -y -f image2 {} -i {} {} {}'.format(
-            shlex.quote(pngdir), early_options, shlex.quote(pngs), ffmpeg_options, shlex.quote(savefile))
+        cmd = 'cd {}; {} -nostdin -y -f image2 {} -i {} {} {}'.format(
+            shlex.quote(pngdir), shlex.quote(FFmpeg().absolute_filename()),
+            early_options, shlex.quote(pngs), ffmpeg_options, shlex.quote(savefile))
         from subprocess import check_call, CalledProcessError, PIPE
         try:
             if sage.misc.verbose.get_verbose() > 0: