Remove redundants imports, remove useless braces
Remove unused import.
Using `_` instead of a useless named variable.
Remove a unused variable name and remove unused import.
Remove unused variables and unused import.
fixup! removing unused import.
Use liftM from Control.Monad for expressivity in some expressions.

Remove unused imports etc...
fixup! Unused imports and variables.
fixup! Unused imports and variables.
fixup! Unused imports, variables and rewriting a fonction in point free syntax.
Unused Variables and rewriting some patterns for expressiveness
Remove unused imports, rewriting expressing, clean up.
Unused import, variables and rewriting an expression with isJust.
fixup! Unused Variables.
fixup! Unused imports, variables... Clean up
Remove unused imports, variables and esthetics.