DOC: adjust example in readme

README.md

@@ -115,22 +115,15 @@ packages:
  - fslpy 3.7.0
  - fsl-avwutils 2007.0
  - fsl-base 2109.1
- - fsl-eddy-cpu 2106.0
+ - fsl-eddy 2106.0
  - fsl-sub 2.5.8
  - libopenblas 0.3.18 *openmp*
  ...
 
-# List of additional packages that
-# are added to linux-64 installations.
+# List of additional platform-specific
+# packages to be installed.
 linux-64-packages: []
-
-# List of additional packages that
-# are added to macos-64 installations.
-macos-64-packages:
- # Newer libffi causes FSLeyes to segfault:
- # https://github.com/conda-forge/pyobjc-core-feedstock/issues/37
- - libffi 3.3
-
+macos-64-packages: []
 macos-M1-packages: []
 ```