remove unnecessary method syntax

test/language/expressions/addition/order-of-evaluation.js

test/language/expressions/bitwise-and/order-of-evaluation.js

test/language/expressions/bitwise-or/order-of-evaluation.js

test/language/expressions/bitwise-xor/order-of-evaluation.js

test/language/expressions/division/order-of-evaluation.js

...anguage/expressions/exponentiation/order-of-evaluation.js

test/language/expressions/left-shift/order-of-evaluation.js

test/language/expressions/modulus/order-of-evaluation.js

...anguage/expressions/multiplication/order-of-evaluation.js

test/language/expressions/right-shift/order-of-evaluation.js

test/language/expressions/subtraction/order-of-evaluation.js

...e/expressions/unsigned-right-shift/order-of-evaluation.js