Remove unused InnoDB function parameters and functions.
i_s_sys_virtual_fill_table(): Do not allocate heap memory.
mtr_is_block_fix(): Replace with mtr_memo_contains().
mtr_is_page_fix(): Replace with mtr_memo_contains_page().
For placement new, throw() exception specification was removed by
accident in 8fe04a3df3 , making debug
tests, that simulate out-of-memory situations, fail (e.g filesort_debug)
no matching operator delete found; memory will not be freed if initialization throws an exception
Added a no-op delete() for MEM_ROOT based placement-new()
