Revert "Rename the plugin."

This reverts commit 5dc0bb7b4201ee9626225c0218f01ff04d2e474e.
Revert "Rename the pylint plugin module."

This reverts commit 79fb639ef6a91df24f4d52288edf81c2c787b950.
Revert "Recognize UTF-8 BOM and some other cases"

This reverts commit 25d0315626a1744ad6ff6109d2e4c6df3e782a2e.
Revert "Add pylint checker for file encoding"

This reverts commit 126c80397aaf3c6312198ab192b408cf6c562824.