doc: remove mold use on mac for speeding up build

Co-authored-by: Vinicius Lourenço
<[email protected]>

Author: congzhangzh

BUILDING.md

@@ -536,25 +536,32 @@ If you encounter any difficulties, consider disabling `mold` as a
 troubleshooting step.
 
 If you plan to frequently rebuild Node.js, especially if using several
-branches, installing `ccache` and `mold` can help to greatly reduce build
+branches, installing `ccache` can help to greatly reduce build
 times. Set up with:
 
 On GNU/Linux:
 
+Tips: `mold` can speed up the link process, which can't be cached, you may
+need to install the latest version but not the apt version.
+
 ```bash
 sudo apt install ccache mold   # for Debian/Ubuntu, included in most Linux distros
 export CC="ccache gcc"         # add to your .profile
 export CXX="ccache g++"        # add to your .profile
 export LDFLAGS="-fuse-ld=mold" # add to your .profile
 ```
 
+Refs:
+
+1. <https://ccache.dev/performance.html>
+2. <https://github.com/rui314/mold>
+
 On macOS:
 
 ```bash
-brew install ccache mold       # see https://brew.sh
+brew install ccache            # see https://brew.sh
 export CC="ccache cc"          # add to ~/.zshrc or other shell config file
 export CXX="ccache c++"        # add to ~/.zshrc or other shell config file
-export LDFLAGS="-fuse-ld=mold" # add to ~/.zshrc or other shell config file
 ```
 
 This will allow for near-instantaneous rebuilds when switching branches back
@@ -572,11 +579,6 @@ the specified directory. The JS debugger of Visual Studio Code supports this
 configuration since the November 2020 version and allows for setting
 breakpoints.
 
-Refs:
-
-1. <https://ccache.dev/performance.html>
-2. <https://github.com/rui314/mold>
-
 #### Troubleshooting Unix and macOS builds
 
 Stale builds can sometimes result in `file not found` errors while building.