remove beta notice
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@ -52,9 +52,6 @@ library SafeMath {
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* Requirements:
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* - Subtraction cannot overflow.
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*
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* NOTE: This is a feature of the next version of OpenZeppelin Contracts.
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* @dev Get it via `npm install @openzeppelin/contracts@next`.
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*
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* _Available since v2.4.0._
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*/
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function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
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@ -112,9 +109,6 @@ library SafeMath {
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*
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* Requirements:
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* - The divisor cannot be zero.
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* NOTE: This is a feature of the next version of OpenZeppelin Contracts.
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* @dev Get it via `npm install @openzeppelin/contracts@next`.
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*
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* _Available since v2.4.0._
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*/
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@ -153,9 +147,6 @@ library SafeMath {
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* Requirements:
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* - The divisor cannot be zero.
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*
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* NOTE: This is a feature of the next version of OpenZeppelin Contracts.
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* @dev Get it via `npm install @openzeppelin/contracts@next`.
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*
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* _Available since v2.4.0._
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*/
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function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
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