documentation update
diff --git a/docs/source/_static/Riscduino_Soc.png b/docs/source/_static/Riscduino_Soc.png
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diff --git a/docs/source/_static/YiFive_Soc.png b/docs/source/_static/YiFive_Soc.png
deleted file mode 100644
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--- a/docs/source/_static/YiFive_Soc.png
+++ /dev/null
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