Remove redundant tests

Author: haampie

tests/unit/ParserTest.php

@@ -13,8 +13,6 @@ public function testCreatingParserWithString()
     {
         $parser = new Parser("Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; InfoPath.1)");
 
-        $this->assertTrue($parser instanceof \WhichBrowser\Parser);
-
         $this->assertTrue($parser->isBrowser('Internet Explorer', '=', '6.0'));
     }
 
@@ -24,8 +22,6 @@ public function testCreatingParserWithHeaders()
             'User-Agent' => 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; InfoPath.1)'
         ]);
 
-        $this->assertTrue($parser instanceof \WhichBrowser\Parser);
-
         $this->assertTrue($parser->isBrowser('Internet Explorer', '=', '6.0'));
     }
 
@@ -37,8 +33,6 @@ public function testCreatingParserWithOptions()
             ]
         ]);
 
-        $this->assertTrue($parser instanceof \WhichBrowser\Parser);
-
         $this->assertTrue($parser->isBrowser('Internet Explorer', '=', '6.0'));
     }