doc: remove unnecessary contents

doc/about.md

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+# About
+
+Hi, I'm Yves. I'm a developer who <3 the terminal and everything around text interfaces.

doc/blog.md

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+# Blog
+
+This is the main entry page for my blog. I plan on writing on things I feel like worth sharing, mentioning for other developers, tinkers like me.
+
+The blog is currently a work in progress and will be updated once a first version of the tui website supports more dynamic contents.