Removed unnecessary lifetime annotations

[OliveIsAWord]

Out of 110 lifetime generics in 20 files, only 23 in 4 files were necessary for compilation. This should make code more readable and not affect behavior in any way.

Hopefully this works. I tested it locally on both 1.31 and the latest version 1.59.

[OliveIsAWord]

Right, silly oversight on my part. It should work now I believe.

[cuviper]

Hi again -- I don't know why I didn't merge this before, but let's try now...

bors r+

[bors[bot]]

Build succeeded:

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