fixup: remove callgrind headers; do start/stop with walltime

Author: not-matthias

core/include/callgrind.h

@@ -8,10 +8,6 @@
 #include <unistd.h>
 #endif
 
-#ifdef CODSPEED_INSTRUMENTATION
-#include "callgrind.h"
-#endif
-
 extern "C" {
 #include "core.h"
 }
@@ -32,7 +28,6 @@ inline std::string get_version() {
 #endif
 }
 
-#ifdef CODSPEED_INSTRUMENTATION
 inline bool measurement_is_instrumented() {
   return instrument_hooks_is_instrumented(g_hooks);
 }
@@ -50,7 +45,7 @@ __attribute__((always_inline)) inline void measurement_stop() {
   instrument_hooks_stop_benchmark_inline(g_hooks);
 }
 
-__attribute__((always_inline)) inline void measurement_executed_benchmark(
+__attribute__((always_inline)) inline void measurement_set_executed_benchmark(
     const std::string& name) {
 #ifdef _WIN32
   auto current_pid = _getpid();
@@ -59,15 +54,5 @@ __attribute__((always_inline)) inline void measurement_executed_benchmark(
 #endif
   instrument_hooks_executed_benchmark(g_hooks, current_pid, name.c_str());
 }
-#else
-// Stub implementations for non-instrumentation builds
-inline bool measurement_is_instrumented() { return false; }
-inline void measurement_set_metadata() {}
-inline void measurement_start() {}
-inline void measurement_stop() {}
-inline void measurement_executed_benchmark(const std::string& name) {
-  (void)name;
-}
-#endif
 
 #endif  // MEASUREMENT_H