Merge #171

171: install-macos: remove Homebrew tap command r=therealprof a=vitorgalvao

You don’t need to

```bash
brew tap armmbed/formulae
brew install armmbed/formulae/arm-none-eabi-gcc
```

You either

```bash
brew tap armmbed/formulae
brew install arm-none-eabi-gcc
```

Or you

```bash
brew install armmbed/formulae/arm-none-eabi-gcc
```

Which taps and installs in a single command.

Co-authored-by: Vítor Galvão <info@vitorgalvao.com>

Author: bors[bot]

src/intro/install/macos.md

@@ -6,7 +6,6 @@ All the tools can be install using [Homebrew]:
 
 ``` console
 $ # GDB
-$ brew tap armmbed/formulae
 $ brew install armmbed/formulae/arm-none-eabi-gcc
 
 $ # OpenOCD