colors parameter doesn't have any effect

In using perfplot today I noticed there is a colors parameter included in the readme example, but this doesn't actually seem to be used anywhere. It gets passed through to PerfplotData but then isn't used after that point:

perfplot/perfplot/main.py

Lines 66 to 71 in fa5f029

    
           self.colors = colors 
        
           if self.colors is None: 
        
               colors = plt.rcParams["axes.prop_cycle"].by_key()["color"] 
        
               # extend colors list to fit all self.labels 
        
               colors *= -(-len(self.labels) // len(colors)) 
        
               self.colors = colors[: len(self.labels)]

I guess this is probably just an artefact from a previous version? I'd be happy to pull together a PR stripping this out, and maybe there's an argument to be made for providing a dedicated example of how to vary the colours in use.

	self.colors = colors
	if self.colors is None:
	colors = plt.rcParams["axes.prop_cycle"].by_key()["color"]
	# extend colors list to fit all self.labels
	colors *= -(-len(self.labels) // len(colors))
	self.colors = colors[: len(self.labels)]