Update compiling mono page to remove mono-devel package

It is usually outdated in the Debian/Ubuntu repos and we don't need it since we have monolite.

docs/compiling-mono/linux/index.md

@@ -40,7 +40,7 @@ On Debian based distribution you should guarantee that some packages are install
 This can be done easily by using *apt-get*:
 
 ```bash
-  $ sudo apt-get install git autoconf libtool automake build-essential mono-devel gettext cmake python
+  $ sudo apt-get install git autoconf libtool automake build-essential gettext cmake python
 ```
 
 Note: if you are using Ubuntu 15.04/Debian 8 or later, you also need to install the `libtool-bin` package. Without it, you will get the following error: `**Error**: You must have 'libtool' installed to compile Mono.`
@@ -96,7 +96,7 @@ sudo mkdir $PREFIX
 sudo chown -R `whoami` $PREFIX
 
 # Ensure that all required packages are installed.
-sudo apt-get install git autoconf libtool automake build-essential mono-devel gettext cmake
+sudo apt-get install git autoconf libtool automake build-essential gettext cmake python
 
 PATH=$PREFIX/bin:$PATH
 git clone https://github.com/mono/mono.git