docs: update examples and fix test case

Author: kgryte

lib/node_modules/@stdlib/string/remove-first/README.md

@@ -71,7 +71,7 @@ var str = removeFirst( 'last man standing' );
 str = removeFirst( 'presidential election' );
 // returns 'residential election'
 
-str = removeFirst( 'javaScript' );
+str = removeFirst( 'JavaScript' );
 // returns 'avaScript'
 
 str = removeFirst( 'Hidden Treasures' );

lib/node_modules/@stdlib/string/remove-first/docs/types/index.d.ts

@@ -34,7 +34,7 @@
 * // returns 'residential election'
 *
 * @example
-* var out = removeFirst( 'javaScript' );
+* var out = removeFirst( 'JavaScript' );
 * // returns 'avaScript'
 *
 * @example

lib/node_modules/@stdlib/string/remove-first/docs/types/test.ts

@@ -43,7 +43,6 @@ import removeFirst = require( './index' );
 	removeFirst( 'abc', true ); // $ExpectError
 	removeFirst( 'abc', false ); // $ExpectError
 	removeFirst( 'abc', null ); // $ExpectError
-	removeFirst( 'abc', undefined ); // $ExpectError
 	removeFirst( 'abc', 'abc' ); // $ExpectError
 	removeFirst( 'abc', [] ); // $ExpectError
 	removeFirst( 'abc', {} ); // $ExpectError

lib/node_modules/@stdlib/string/remove-first/examples/index.js

@@ -26,7 +26,7 @@ console.log( removeFirst( 'last man standing' ) );
 console.log( removeFirst( 'presidential election' ) );
 // => 'residential election'
 
-console.log( removeFirst( 'javaScript' ) );
+console.log( removeFirst( 'JavaScript' ) );
 // => 'avaScript'
 
 console.log( removeFirst( 'Hidden Treasures' ) );

lib/node_modules/@stdlib/string/remove-first/lib/main.js

@@ -46,7 +46,7 @@ var format = require( '@stdlib/string/format' );
 * // returns 'residential election'
 *
 * @example
-* var out = removeFirst( 'javaScript' );
+* var out = removeFirst( 'JavaScript' );
 * // returns 'avaScript'
 *
 * @example