Remove unnecessary functions for memory.

Do not plan to send upstream.

diff --git a/js/src/gc/Memory.cpp b/js/src/gc/Memory.cpp

--- a/js/src/gc/Memory.cpp

+++ b/js/src/gc/Memory.cpp

@@ -12,21 +12,16 @@

 #include "js/HeapAPI.h"

 #include "vm/Runtime.h"

 #if defined(XP_WIN)

 #include "jswin.h"

 #include <psapi.h>

-#elif defined(SOLARIS)

-

-#include <sys/mman.h>

-#include <unistd.h>

-

 #elif defined(XP_UNIX)

 #include <algorithm>

 #include <errno.h>

 #include <sys/mman.h>

 #include <sys/resource.h>

 #include <sys/stat.h>

 #include <sys/types.h>

     // TODO: Bug 988813 - Support memory mapped array buffer for Windows platform.

 }

-#elif defined(SOLARIS)

-

-#ifndef MAP_NOSYNC

-# define MAP_NOSYNC 0

-#endif

-

-void

-InitMemorySubsystem()

-{

-    if (pageSize == 0)

-        pageSize = allocGranularity = size_t(sysconf(_SC_PAGESIZE));

-}

-

-void*

-MapAlignedPages(size_t size, size_t alignment)

-{

-    MOZ_ASSERT(size >= alignment);

-    MOZ_ASSERT(size % alignment == 0);

-    MOZ_ASSERT(size % pageSize == 0);

-    MOZ_ASSERT(alignment % allocGranularity == 0);

-

-    int prot = PROT_READ | PROT_WRITE;

-    int flags = MAP_PRIVATE | MAP_ANON | MAP_ALIGN | MAP_NOSYNC;

-

-    void* p = mmap((caddr_t)alignment, size, prot, flags, -1, 0);

-    if (p == MAP_FAILED)

-        return nullptr;

-    return p;

-}

-

-void

-UnmapPages(void* p, size_t size)

-{

-    MOZ_ALWAYS_TRUE(0 == munmap((caddr_t)p, size));

-}

-

-bool

-MarkPagesUnused(void* p, size_t size)

-{

-    MOZ_ASSERT(OffsetFromAligned(p, pageSize) == 0);

-    return true;

-}

-

-bool

-MarkPagesInUse(void* p, size_t size)

-{

-    if (!DecommitEnabled())

-        return true;

-

-    MOZ_ASSERT(OffsetFromAligned(p, pageSize) == 0);

-    return true;

-}

-

-size_t

-GetPageFaultCount()

-{

-    return 0;

-}

-

-void*

-AllocateMappedContent(int fd, size_t offset, size_t length, size_t alignment)

-{

-    // Not implemented.

-    return nullptr;

-}

-

-// Deallocate mapped memory for object.

-void

-DeallocateMappedContent(void* p, size_t length)

-{

-    // Not implemented.

-}

-

 #elif defined(XP_UNIX)

 void

@@ -599,17 +521,17 @@ UnmapPages(void* p, size_t size)

 bool

 MarkPagesUnused(void* p, size_t size)

 {

     if (!DecommitEnabled())

         return false;

     MOZ_ASSERT(OffsetFromAligned(p, pageSize) == 0);

-    int result = madvise(p, size, MADV_DONTNEED);

+    int result = madvise((caddr_t)p, size, MADV_DONTNEED);

     return result != -1;

 }

 bool

 MarkPagesInUse(void* p, size_t size)

 {

     if (!DecommitEnabled())

         return true;