[toolchains] Remove old documentation

And add missing - draw -command documention

beat/cmdline/toolchains.py

@@ -25,7 +25,6 @@
 #                                                                             #
 ###############################################################################
 
-
 import click
 from . import common
 
@@ -220,6 +219,7 @@ def rm(ctx, name):
               'current directory)', type=click.Path())
 @click.pass_context
 def draw(ctx, name, path):
+    '''Creates a visual representation of the toolchain'''
     return common.dot_diagram(
         ctx.meta['config'].path, 'toolchain', name, path, []
     )