Delete occurrences of words like "simple" and "basic"

[KevinWorkman]

I want to avoid using words like "simple" or phrases like "just do xyz".

At best these are filler, and at worst they belittle the reader.

Unfortunately, these are all over the place, especially in the older tutorials. If you see these, please feel free to send a PR deleting them.

Some things to look out for:

• just
• basic (often the word fundamental is better)
• simple / simply
• easy

Another pet peeve is saying "abc allows you to do xyz" instead of saying "abc lets you do xyz" so feel free to find/replace those occurrences as well.