gap: remove GAP_SO, no longer needed

Author: tornaria

src/sage/env.py

@@ -250,81 +250,6 @@ def var(key: str, *fallbacks: Optional[str], force: bool = False) -> Optional[st
 SAGE_GAP_COMMAND = var('SAGE_GAP_COMMAND', _gap_cmd)
 
 
-def _get_shared_lib_path(*libnames: str) -> Optional[str]:
-    """
-    Return the full path to a shared library file installed in
-    ``$SAGE_LOCAL/lib`` or the directories associated with the
-    Python sysconfig.
-
-    This can also be passed more than one library name (e.g. for cases where
-    some library may have multiple names depending on the platform) in which
-    case the first one found is returned.
-
-    This supports most *NIX variants (in which ``lib<libname>.so`` is found
-    under ``$SAGE_LOCAL/lib``), macOS (same, but with the ``.dylib``
-    extension), and Cygwin (under ``$SAGE_LOCAL/bin/cyg<libname>.dll``,
-    or ``$SAGE_LOCAL/bin/cyg<libname>-*.dll`` for versioned DLLs).
-
-    For distributions like Debian that use a multiarch layout, we also try the
-    multiarch lib paths (i.e. ``/usr/lib/<arch>/``).
-
-    This returns ``None`` if no matching library file could be found.
-
-    EXAMPLES::
-
-        sage: from sage.env import _get_shared_lib_path
-        sage: "gap" in _get_shared_lib_path("gap")
-        True
-        sage: _get_shared_lib_path("an_absurd_lib") is None
-        True
-
-    """
-
-    for libname in libnames:
-        search_directories: List[Path] = []
-        patterns: List[str] = []
-        if sys.platform == 'cygwin':
-            # Later down we take the first matching DLL found, so search
-            # SAGE_LOCAL first so that it takes precedence
-            if SAGE_LOCAL:
-                search_directories.append(Path(SAGE_LOCAL) / 'bin')
-            search_directories.append(Path(sysconfig.get_config_var('BINDIR')))
-            # Note: The following is not very robust, since if there are multible
-            # versions for the same library this just selects one more or less
-            # at arbitrary. However, practically speaking, on Cygwin, there
-            # will only ever be one version
-            patterns = [f'cyg{libname}.dll', f'cyg{libname}-*.dll']
-        else:
-            if sys.platform == 'darwin':
-                ext = 'dylib'
-            else:
-                ext = 'so'
-
-            if SAGE_LOCAL:
-                search_directories.append(Path(SAGE_LOCAL) / 'lib')
-            libdir = sysconfig.get_config_var('LIBDIR')
-            if libdir is not None:
-                libdir = Path(libdir)
-                search_directories.append(libdir)
-
-                multiarchlib = sysconfig.get_config_var('MULTIARCH')
-                if multiarchlib is not None:
-                    search_directories.append(libdir / multiarchlib),
-
-            patterns = [f'lib{libname}.{ext}']
-
-        for directory in search_directories:
-            for pattern in patterns:
-                path = next(directory.glob(pattern), None)
-                if path is not None:
-                    return str(path.resolve())
-
-    # Just return None if no files were found
-    return None
-
-# locate libgap shared object
-GAP_SO = var("GAP_SO", _get_shared_lib_path("gap", ""))
-
 # post process
 if DOT_SAGE is not None and ' ' in DOT_SAGE:
     if UNAME[:6] == 'CYGWIN':