Revert "Deduplicate test cases in generator" (#4716)

This PR reverts the following:

* #4706

(1) This didn't actually fix the issue and more importantly (2) it
results in missing test cases. This is apparent if you look at the size
of the zip files in the beta.2 release. Thank you @etan-status for
pointing this out.

Author: jtraglia

tests/core/pyspec/eth2spec/gen_helpers/gen_base/gen_runner.py

@@ -130,23 +130,9 @@ def debug_print(msg):
     # Gracefully handle Ctrl+C
     install_sigint_handler(console)
 
-    # Deduplicate test cases based on identifier
-    input_test_cases_list = list(input_test_cases)
-    seen_identifiers = {}
-    deduplicated_test_cases = []
-    for test_case in input_test_cases_list:
-        identifier = test_case.get_identifier()
-        if identifier not in seen_identifiers:
-            seen_identifiers[identifier] = True
-            deduplicated_test_cases.append(test_case)
-
-    debug_print(f"Total test cases before deduplication: {len(input_test_cases_list)}")
-    debug_print(f"Total test cases after deduplication: {len(deduplicated_test_cases)}")
-    debug_print(f"Duplicates removed: {len(input_test_cases_list) - len(deduplicated_test_cases)}")
-
     total_found = 0
     selected_test_cases = []
-    for test_case in deduplicated_test_cases:
+    for test_case in input_test_cases:
         total_found += 1
         # Check if the test case should be filtered out
         if len(args.runners) != 0 and test_case.runner_name not in args.runners: