Revert "ANDROID: vendor_hooks: FPSIMD save/restore by using vendor_hooks"

This reverts commit 74555f39.

The hook android_vh_is_fpsimd_save is not used by any vendor, so remove
it to help with merge issues with future LTS releases.

If this is needed by any real user, it can easily be reverted to add it
back and then the symbol should be added to the abi list at the same
time to prevent it from being removed again later.

Bug: 203756332
Bug: 149632552
Cc: Wooyeon Kim <wooy88.kim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Idecd20a8791c5e4497f8d2222cc54cc42b2ebdff