Removing 'Create' Button from relationship select field based on parent module and current module

selection-headerpane.js

initialize: function(options) {
  /* Removing 'Create' Button from relationship select field based on parent module and current module
   * Ajay Kumar
   * Path : custom/modules/Accounts/clients/base/views/selection-headerpane/selection-headerpane.js
   */
    var moduleMeta = app.metadata.getModule(options.module),
        isBwcEnabled = (moduleMeta && moduleMeta.isBwcEnabled),
        buttonsToRemove = [],
        additionalEvents = {};
    if (isBwcEnabled) {
        buttonsToRemove.push('create_button');
    } else {
        additionalEvents['click .btn[name=create_button]'] = 'createAndSelect';
        this.events = _.extend({}, this.events, additionalEvents);
    }
    this.isMultiLink = options.context.has('recLink');
    if (!this.isMultiLink) {
        buttonsToRemove.push('link_button');
    }
    var parentModule = options.context.parent.attributes.module;
    var currentModule = options.module;
    if (_.isEqual(parentModule, "Opportunities") && _.isEqual(currentModule, "Accounts")) {
        buttonsToRemove.push('create_button');
    }
    options = this._removeButtons(options, buttonsToRemove);
    this._super('initialize', [options]);
}

The Search and Select Accounts, buttons cancel,create and toggle comes from view "selection-headerpane.
Copy file from /clients/base/views/selection-headerpane/selection-headerpane.js to
custom/modules/Accounts/clients/base/views/selection-headerpane/selection-headerpane.js.
Line Numer 20-24 will remove create button.