Remove modulus double free

Signed-off-by: Xiaokang Qian <xiaokang.qian@arm.com>
diff --git a/tests/suites/test_suite_ecp.function b/tests/suites/test_suite_ecp.function
index 5ba6922..56bc179 100644
--- a/tests/suites/test_suite_ecp.function
+++ b/tests/suites/test_suite_ecp.function
@@ -1601,8 +1601,6 @@
                                          MBEDTLS_MPI_MOD_EXT_REP_LE), 0);
         TEST_EQUAL(memcmp(bufx, &Result, sizeof(mbedtls_mpi_uint)), 0);
 
-        /* Test for user free-ing allocated memory */
-        mbedtls_mpi_mod_modulus_free(&m);
     }
 
 exit: