MCOL-1579 Remove chmod of /dev/shm

We appear to chmod /dev/shm as a workaround to a CentOS 7 bug that was
fixed last year which accidentally set it to 755. If a user has /dev/shm
locked down we should get them to fix it rather than modifying it
ourselves.

The code before this fixed changed a root install to 755 for /dev/shm
which instantly broke anything using mmap() with MAP_SHARED as an
unprivileged user.

procmon/main.cpp

@@ -131,13 +131,6 @@ int main(int argc, char **argv)
 	if (p && *p)
    		USER = p;
 
-	// change permissions on /dev/shm
-	if ( !rootUser)
-	{
-		string cmd = "sudo chmod 777 /dev/shm >/dev/null 2>&1";
-		system(cmd.c_str());
-	}
-
   	// get and set locale language    
 	string systemLang = "C";