Remove F14Memory.h header file from Makefile.am (#874)

Summary:
The headerfile was removed from the source tree, but is still
referenced, causing autotools based builds to fail.
Closes https://github.com/facebook/folly/pull/874

Reviewed By: nbronson

Differential Revision: D8531520

Pulled By: calebmarchent

fbshipit-source-id: 33844e57f4551a66dd13ab9ec03a441c7779c41e

folly/Makefile.am

@@ -69,7 +69,6 @@ nobase_follyinclude_HEADERS = \
 	container/detail/BitIteratorDetail.h \
 	container/detail/F14Defaults.h \
 	container/detail/F14IntrinsicsAvailability.h \
-	container/detail/F14Memory.h \
 	container/detail/F14Policy.h \
 	container/detail/F14Table.h \
 	container/Iterator.h \