Remove redundant ROCPROFSYS_TRACE_CACHED variable from the code (#2434)

projects/rocprofiler-systems/source/bin/rocprof-sys-sample/impl.cpp

@@ -339,19 +339,17 @@ parse_args(int argc, char** argv, std::vector<char*>& _env)
                                                original_envs);
         });
     parser
-        .add_argument(
-            { "-T", "--trace" },
-            "Generate a detailed trace with deferred trace generation (perfetto output)")
+        .add_argument({ "-T", "--trace" }, "Generate a detailed trace (perfetto output)")
         .max_count(1)
         .action([&](parser_t& p) {
-            rocprofsys::common::update_env(_env, "ROCPROFSYS_TRACE_CACHED",
-                                           p.get<bool>("trace"), update_mode::REPLACE,
-                                           ":", updated_envs, original_envs);
+            rocprofsys::common::update_env(_env, "ROCPROFSYS_TRACE", p.get<bool>("trace"),
+                                           update_mode::REPLACE, ":", updated_envs,
+                                           original_envs);
         });
     parser
-        .add_argument(
-            { "-L", "--trace-legacy" },
-            "Generate a detailed trace with direct mode (perfetto output, legacy)")
+        .add_argument({ "-L", "--trace-legacy" },
+                      "Use legacy direct mode for tracing instead of deferred trace "
+                      "generation (higher overhead)")
         .max_count(1)
         .action([&](parser_t& p) {
             rocprofsys::common::update_env(