Update "Exporting for PC" to remove outdated information

As of Godot 3.0, it is no longer possible to bundle project data
inside the executable.

getting_started/workflow/export/exporting_for_pc.rst

@@ -4,14 +4,11 @@ Exporting for PC
 ================
 
 The simplest way to distribute a game for PC is to copy the executables
-(godot.exe on windows, godot on the rest), zip the folder and send it to
-someone else. However, this is often not desired.
+(godot.exe on Windows, godot on the rest), compress the folder and send it
+to someone else. However, this is often not desired.
 
 Godot offers a more elegant approach for PC distribution when using the
-export system. When exporting for PC (Linux, Windows, Mac), the exporter
-takes all the project files and creates a "data.pck" file. This file is
+export system. When exporting for PC (Linux, Windows, macOS), the exporter
+takes all the project files and creates a ``data.pck`` file. This file is
 bundled with a specially optimized binary that is smaller, faster and
-lacks tools and debugger.
-
-Optionally, the files can be bundled inside the executable, though this
-does not always works properly.
+does not contain the editor and debugger.