Don't depend on Documenter (#332)

It was accidentally added in last PR.

Author: kahaaga

Project.toml

@@ -12,7 +12,6 @@ DSP = "717857b8-e6f2-59f4-9121-6e50c889abd2"
 DelayEmbeddings = "5732040d-69e3-5649-938a-b6b4f237613f"
 Distances = "b4f34e82-e78d-54a5-968a-f98e89d6e8f7"
 Distributions = "31c24e10-a181-5473-b8eb-7969acd0382f"
-Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
 DynamicalSystemsBase = "6e36e845-645a-534a-86f2-f5d4aa5a06b4"
 Graphs = "86223c79-3864-5bf0-83f7-82e725a168b6"
 HypothesisTests = "09f84164-cd44-5f33-b23f-e6b0d136a0d5"