Revert "Added --content-only flag for borg 1.2.4 in diff view"

This reverts commit e0fe766051.

src/vorta/borg/_compatibility.py

@@ -5,7 +5,6 @@ MIN_BORG_FOR_FEATURE = {
     'ZSTD': parse_version('1.1.4'),
     'JSON_LOG': parse_version('1.1.0'),
     'DIFF_JSON_LINES': parse_version('1.1.16'),
-    'DIFF_CONTENT_ONLY': parse_version('1.2.4'),
     'COMPACT_SUBCOMMAND': parse_version('1.2.0a1'),
     'V122': parse_version('1.2.2'),
     'V2': parse_version('2.0.0b1'),

src/vorta/borg/diff.py

@@ -28,9 +28,6 @@ class BorgDiffJob(BorgJob):
             ret['cmd'].append('--json-lines')
             ret['json_lines'] = True
 
-        if borg_compat.check('DIFF_CONTENT_ONLY'):
-            ret['cmd'].append('--content-only')
-
         if borg_compat.check('V2'):
             ret['cmd'].extend(['-r', profile.repo.url, archive_name_1, archive_name_2])
         else: