Unused variables

[epoberezkin]

A lot of noise when minifying browserified bundle (more than half are from dependencies though):

WARN: Dropping unused function forEach [dist/regenerator.bundle.js:2833,9]
WARN: Side effects in initialization of unused variable EE [dist/regenerator.bundle.js:2890,4]
WARN: Dropping unused function detectConstantLets [dist/regenerator.bundle.js:8448,9]
WARN: Dropping unused function isUnaryLike [dist/regenerator.bundle.js:18683,9]
WARN: Side effects in initialization of unused variable Node [dist/regenerator.bundle.js:18336,4]
WARN: Side effects in initialization of unused variable isString [dist/regenerator.bundle.js:19665,4]
WARN: Side effects in initialization of unused variable n [dist/regenerator.bundle.js:20041,4]
WARN: Side effects in initialization of unused variable isFunction [dist/regenerator.bundle.js:20045,4]
WARN: Side effects in initialization of unused variable Patcher [dist/regenerator.bundle.js:20046,4]
WARN: Side effects in initialization of unused variable getFieldValue [dist/regenerator.bundle.js:20186,4]
WARN: Side effects in initialization of unused variable i [dist/regenerator.bundle.js:22160,12]
WARN: Side effects in initialization of unused variable sourceMap [dist/regenerator.bundle.js:20666,4]
WARN: Side effects in initialization of unused variable assert [dist/regenerator.bundle.js:22437,4]
WARN: Side effects in initialization of unused variable getFieldValue [dist/regenerator.bundle.js:22439,4]
WARN: Side effects in initialization of unused variable builtin [dist/regenerator.bundle.js:23470,4]
WARN: Dropping unused function isUnaryLike [dist/regenerator.bundle.js:24467,9]
WARN: Side effects in initialization of unused variable Printable [dist/regenerator.bundle.js:24645,4]
WARN: Side effects in initialization of unused variable slice [dist/regenerator.bundle.js:25070,4]
WARN: Side effects in initialization of unused variable map [dist/regenerator.bundle.js:25071,4]
WARN: Side effects in initialization of unused variable map [dist/regenerator.bundle.js:25774,4]
WARN: Side effects in initialization of unused variable each [dist/regenerator.bundle.js:25775,4]
WARN: Side effects in initialization of unused variable isRegExp [dist/regenerator.bundle.js:25886,4]
WARN: Side effects in initialization of unused variable isDate [dist/regenerator.bundle.js:25887,4]
WARN: Side effects in initialization of unused variable isBoolean [dist/regenerator.bundle.js:25889,4]
WARN: Side effects in initialization of unused variable isNull [dist/regenerator.bundle.js:25890,4]