Magento – remove signin and create account link and add 2 new custom links in place of that magento 2.1.3

Suppose package:Learning and module: Custom

Module.xml looks like

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../lib/internal/Magento/Framework/Module/etc/module.xsd">
    <module name="Learning_Custom" setup_version="2.0.0">
        <sequence>
            <module name="Magento_Catalog"/>
        </sequence>
    </module>
</config>

And then create a layout xml following path -> app/code/Learning/Custom/view/frontend/layout/catalog_product_prices.xml

<layout xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../../../lib/internal/Magento/Framework/View/Layout/etc/layout_generic.xsd">
    <referenceBlock name="render.product.prices">
        <arguments>
            <argument name="default" xsi:type="array">
                <item name="prices" xsi:type="array">
                    <item name="tier_price" xsi:type="array">
                        <item name="render_template" xsi:type="string">Learning_Custom::product/price/tier_prices.phtml
                    </item>
                </item>
            </argument>
        </arguments>
    </referenceBlock>
</layout>

Create template inside your module or copy base template file inside your module path should be -> app/code/Learning/Custom/view/frontend/templates/product/price/tier_prices.phtml

Finally i have resolve my issue . Only Need to override Subscriber. I am posting my entire code. may be it will helpful to someone. di.xml

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Newsletter\Model\Subscriber" type="Navin\Subscribe\Model\Subscriber" />
</config>

Subscriber.php Model Files

namespace Navin\Subscribe\Model;

class Subscriber extends \Magento\Newsletter\Model\Subscriber {

    /**
     * Initialize resource model
     *
     * @return void
     */

    public function subscribe($email, $subscriber_name = '', $subscriber_date_of_birth = '', $subscriber_country_code = '') {

        $this->loadByEmail($email);

        if (!$this->getId()) {
            $this->setSubscriberConfirmCode($this->randomSequence());
        }

        $isConfirmNeed = $this->_scopeConfig->getValue(
                        self::XML_PATH_CONFIRMATION_FLAG, \Magento\Store\Model\ScopeInterface::SCOPE_STORE
                ) == 1 ? true : false;
        $isOwnSubscribes = false;

        $isSubscribeOwnEmail = $this->_customerSession->isLoggedIn() && $this->_customerSession->getCustomerDataObject()->getEmail() == $email;

        if (!$this->getId() || $this->getStatus() == self::STATUS_UNSUBSCRIBED || $this->getStatus() == self::STATUS_NOT_ACTIVE
        ) {
            if ($isConfirmNeed === true) {
                // if user subscribes own login email - confirmation is not needed
                $isOwnSubscribes = $isSubscribeOwnEmail;
                if ($isOwnSubscribes == true) {
                    $this->setStatus(self::STATUS_SUBSCRIBED);
                } else {
                    $this->setStatus(self::STATUS_NOT_ACTIVE);
                }
            } else {
                $this->setStatus(self::STATUS_SUBSCRIBED);
            }

            $this->setSubscriberEmail($_POST['email']);

        }

        if(!empty($_POST['subscriber_name']) ){
                $this->setSubscriberName($_POST['subscriber_name']); //subscriber_name
                $this->setSubscriberDateofbirth($_POST['subscriber_dateofbirth']); //date of birth
                $this->setSubscriberCountrycode($_POST['subscriber_countrycode']); //country code
        }

        if ($isSubscribeOwnEmail) {
            try {
                $customer = $this->customerRepository->getById($this->_customerSession->getCustomerId());
                $this->setStoreId($customer->getStoreId());
                $this->setCustomerId($customer->getId());
            } catch (NoSuchEntityException $e) {
                $this->setStoreId($this->_storeManager->getStore()->getId());
                $this->setCustomerId(0);
            }
        } else {
            $this->setStoreId($this->_storeManager->getStore()->getId());
            $this->setCustomerId(0);
        }

        $this->setStatusChanged(true);

        try {
            $this->save();
            if ($isConfirmNeed === true && $isOwnSubscribes === false
            ) {
                $this->sendConfirmationRequestEmail();
            } else {
                $this->sendConfirmationSuccessEmail();
            }
            return $this->getStatus();
        } catch (\Exception $e) {
            throw new \Exception($e->getMessage());
        }
    }

}