docs: update descriptions

Author: kgryte

lib/node_modules/@stdlib/random/array/exponential/lib/index.js

@@ -19,7 +19,7 @@
 'use strict';
 
 /**
-* Create an array containing pseudorandom numbers drawn from an exponential distribution with rate parameter `lambda`.
+* Create an array containing pseudorandom numbers drawn from an exponential distribution.
 *
 * @module @stdlib/random/array/exponential
 *

lib/node_modules/@stdlib/random/array/exponential/lib/main.js

@@ -26,7 +26,7 @@ var factory = require( './factory.js' );
 // MAIN //
 
 /**
-* Returns an array containing pseudorandom numbers drawn from an exponential distribution with rate parameter `lambda`.
+* Returns an array containing pseudorandom numbers drawn from an exponential distribution.
 *
 * @name exponential
 * @type {Function}