Don't build dev builds as a fat binary (causes issues when linking against unicorn because nothing is simple in life)

Building-for-macOS.md

@@ -30,11 +30,9 @@ Now you can generate makefiles for the build:
 export MACOSX_DEPLOYMENT_TARGET=10.9
 mkdir build
 cd build
-cmake .. -DCMAKE_OSX_ARCHITECTURES="x86_64;x86_64h" -DCMAKE_BUILD_TYPE=Release
+cmake .. -DCMAKE_BUILD_TYPE=Release
 ```
 
-This builds a fat binary that has slices targeting early and late x64 machines.
-
 ### Building yuzu
 
 ```