Remove unneeded extern "C" from acl_auto_configure.h

While the use of extern "C" is technically valid and results in a
C-compatible symbol name that does not include return and argument
types, the function takes a std::string which is unavailable in C.

Author: pcolberg

include/acl_auto_configure.h

@@ -12,10 +12,6 @@
 #pragma GCC visibility push(protected)
 #endif
 
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
 // Load info about a compiled program from its system description string into
 // devdef.
 // Return true if successful, false otherwise.
@@ -25,10 +21,6 @@ bool acl_load_device_def_from_str(const std::string &config_str,
                                   acl_device_def_autodiscovery_t &devdef,
                                   std::string &err_str) noexcept;
 
-#if defined(__cplusplus)
-} /* extern "C" */
-#endif
-
 #ifdef __GNUC__
 #pragma GCC visibility pop
 #endif