powerpc/book3e: drop mmu_get_tsize()

This function is not used anymore, drop it.

Fixes: b42279f016 ("powerpc/mm/nohash: MM_SLICE is only used by book3s 64")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/mm/nohash/book3e_hugetlbpage.c

@@ -49,11 +49,6 @@ static inline int tlb1_next(void)
 #endif /* !PPC64 */
 #endif /* FSL */
 
-static inline int mmu_get_tsize(int psize)
-{
-	return mmu_psize_defs[psize].enc;
-}
-
 #if defined(CONFIG_PPC_FSL_BOOK3E) && defined(CONFIG_PPC64)
 #include <asm/paca.h>