Remove unused arm defines. DO NOT MERGE

The defines HAVE_32_BYTE_CACHE_LINES and ARCH_ARM_USE_NON_NEON_MEMCPY
are not used by any code. The previous memcpy code that used these
has been split into different architecture versions to avoid the need
for them.

Bug: 8005082

(cherry picked from commit 6e1a5cf31ba47508b08dba02a45b4ea6e1edd6d2)

Change-Id: I69654d47db1458136782b5504290f620e924ee75
1 file changed