Remove error

There is a fallback implementation if dmesg cannot be read

dune/codegen/common/tsc.cc

@@ -96,8 +96,8 @@ namespace Dune {
             if (waitpid(pid,&status,0) < 0)
               DUNE_THROW(TSCError,"Failed to clean up dmesg child process");
 
-            if (WEXITSTATUS(status) != 0)
-              DUNE_THROW(TSCError,"Child process failed with return status " << WEXITSTATUS(status));
+            // if (WEXITSTATUS(status) != 0)
+            //   DUNE_THROW(TSCError,"Child process failed with return status " << WEXITSTATUS(status));
 
             if (result < 0)
               DUNE_THROW(TSCNotInKernelLog,"Could not find TSC frequency information in kernel log");