Remove 1.30.0 and 1.30.1 from the matrix

tools/interop_matrix/client_matrix.py

@@ -219,8 +219,6 @@ LANG_RELEASE_MATRIX = {
             ('v1.27.2', ReleaseInfo()),
             ('v1.28.1', ReleaseInfo()),
             ('v1.29.0', ReleaseInfo()),
-            ('v1.30.0', ReleaseInfo()),
-            ('v1.30.1', ReleaseInfo()),
             ('v1.30.2', ReleaseInfo()),
         ]),
     'python':