Remove unnecessary dependency from macOS/Conda binaries (#8077)

Co-authored-by: Philip Meier <[email protected]>

Author: mthrok

packaging/torchvision/meta.yaml

@@ -11,8 +11,7 @@ requirements:
     - {{ compiler('c') }} # [win]
     - libpng
     - libjpeg-turbo
-    # NOTE: The only ffmpeg version that we build is actually 4.2
-    - ffmpeg >=4.2  # [not win]
+    - ffmpeg >=4.2  # [linux]
 
   host:
     - python
@@ -27,7 +26,7 @@ requirements:
     - numpy >=1.23.5 # [py >= 311]
     - requests
     - libpng
-    - ffmpeg >=4.2  # [not win]
+    - ffmpeg >=4.2  # [linux]
     - libjpeg-turbo
     - pillow >=5.3.0, !=8.3.*
     - pytorch-mutex 1.0 {{ build_variant }}  # [not osx ]