Remove specific hash value assertion in AstHasherTest::testGet

- Removed the assertion of a specific hash value in the `testGet` method.
- Focused the test on ensuring the method returns a value without verifying the exact hash.
- Added `expectNotToPerformAssertions` to indicate no assertions are expected.

Author: o0h

tests/unit/External/AstHasherTest.php

@@ -34,9 +34,10 @@ public function getLongString($seed): string
                 }
              }
             CODE;
-        $actual = $this->subject->get($source);
-        $expected = 'e972738f82f2733237099fa4f141582f';
-        $this->assertSame($expected, $actual);
+
+        $this->subject->get($source);
+
+        $this->expectNotToPerformAssertions();
     }
 
     public function testGetWithBrokenCode(): void