Removing constructor tests

Removing all tests that creates a new instance but doesn't call any
methods nor preform any assertions.

Author: JimTools

Tests/DsnTest.php

@@ -8,14 +8,6 @@
 
 class DsnTest extends TestCase
 {
-    /**
-     * @doesNotPerformAssertions
-     */
-    public function testCouldBeConstructedWithDsnAsFirstArgument()
-    {
-        Dsn::parseFirst('foo://localhost:1234');
-    }
-
     public function testThrowsIfSchemePartIsMissing()
     {
         $this->expectException(\LogicException::class);