generate_psa_tests: remove checks for DH's LEGACY symbols

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/tests/scripts/generate_psa_tests.py b/tests/scripts/generate_psa_tests.py
index cad7884..a3e825d 100755
--- a/tests/scripts/generate_psa_tests.py
+++ b/tests/scripts/generate_psa_tests.py
@@ -121,14 +121,7 @@
     symbols according to the required usage.
     """
     ret_list = list()
-    # Note: this LEGACY replacement DH is temporary and it's going
-    # to be aligned with ECC one in #7773.
-    if dep.endswith('DH_KEY_PAIR'):
-        legacy = dep
-        legacy = re.sub(r'KEY_PAIR\Z', r'KEY_PAIR_LEGACY', legacy)
-        legacy = re.sub(r'PSA_WANT', r'MBEDTLS_PSA_WANT', legacy)
-        ret_list.append(legacy)
-    elif dep.endswith('KEY_PAIR'):
+    if dep.endswith('KEY_PAIR'):
         if usage == "BASIC":
             # BASIC automatically includes IMPORT and EXPORT for test purposes (see
             # config_psa.h).