Because there are so many clippy warnings in the current codebase,
this commit removes '#![cfg_attr(feature = "clippy", deny(clippy))]',
to make it easier to fix warnings incrementally.
The logger implementation will now only show items from Alacritty.
Additionally, the module info is omitted from the log output. If the
origin of a log item must be found, it can easily be grepped for.