Some code comments become obsolete after JDK-8224871. We should remove them:

```
diff --git a/src/hotspot/os/bsd/os_bsd.cpp b/src/hotspot/os/bsd/os_bsd.cpp
index 144ca821307..c8af751250b 100644
--- a/src/hotspot/os/bsd/os_bsd.cpp
+++ b/src/hotspot/os/bsd/os_bsd.cpp
@@ -1769,9 +1769,6 @@ char* os::pd_attempt_reserve_memory_at(char* requested_addr, size_t bytes, bool
   // in one of the methods further up the call chain. See bug 5044738.
   assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");

- // Repeatedly allocate blocks until the block is allocated at the
- // right spot.
-
   // Bsd mmap allows caller to pass an address as hint; give it a try first,
   // if kernel honors the hint then we can return immediately.
   char * addr = anon_mmap(requested_addr, bytes, exec);
diff --git a/src/hotspot/os/linux/os_linux.cpp b/src/hotspot/os/linux/os_linux.cpp
index 42680218d8b..86de46df3d1 100644
--- a/src/hotspot/os/linux/os_linux.cpp
+++ b/src/hotspot/os/linux/os_linux.cpp
@@ -4085,9 +4085,6 @@ char* os::pd_attempt_reserve_memory_at(char* requested_addr, size_t bytes, bool
   // in one of the methods further up the call chain. See bug 5044738.
   assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block");

- // Repeatedly allocate blocks until the block is allocated at the
- // right spot.
-
   // Linux mmap allows caller to pass an address as hint; give it a try first,
   // if kernel honors the hint then we can return immediately.
   char * addr = anon_mmap(requested_addr, bytes);
```