Delete unused function in SysVShmSegment

Summary: This function was defined but never called.  We already create the shm segment with proper page size alignment, no need to call this anymore.

Reviewed By: AlnisM

Differential Revision: D96969274

fbshipit-source-id: 52af9dd43560f16f546efdf25c15a27444a7ef75

Author: rlyerly

cachelib/shm/SysVShmSegment.cpp

@@ -29,9 +29,8 @@
 namespace facebook {
 namespace cachelib {
 
-constexpr static uint32_t kHugePageSize = 1 << 21; // 2MB
-constexpr static uint32_t kModeRWFlags = 0666;     // octal rw for ugo
-constexpr static uint32_t kModeRFlags = 0444;      // octal ro for ugo
+constexpr static uint32_t kModeRWFlags = 0666; // octal rw for ugo
+constexpr static uint32_t kModeRFlags = 0444;  // octal ro for ugo
 
 namespace detail {
 
@@ -206,12 +205,6 @@ void mbindImpl(void* addr,
 
 } // namespace detail
 
-void ensureSizeforHugePage(size_t size) {
-  if (size % kHugePageSize) {
-    util::throwSystemError(EINVAL, "Page not aligned to Huge page size");
-  }
-}
-
 int SysVShmSegment::createNewSegment(key_t key,
                                      size_t size,
                                      const ShmSegmentOpts& opts) {