Remove the sample program aescrypt2

The sample program aescrypt2 shows bad practice: hand-rolled CBC
implementation, CBC+HMAC for AEAD, hand-rolled iterated SHA-2 for key
stretching, no algorithm agility. The new sample program pbcrypt does
the same thing, but better. So remove aescrypt2.

Fix Mbed-TLS#1906

programs/.gitignore

@@ -2,7 +2,6 @@
 *.sln
 *.vcxproj
 
-aes/aescrypt2
 aes/crypt_and_hash
 cipher/pbcrypt
 hash/generic_sum

programs/Makefile

@@ -45,7 +45,7 @@ ifdef ZLIB
 LOCAL_LDFLAGS += -lz
 endif
 
-APPS =	aes/aescrypt2$(EXEXT)		aes/crypt_and_hash$(EXEXT)	\
+APPS =	aes/crypt_and_hash$(EXEXT)	\
 	cipher/pbcrypt$(EXEXT)		\
 	hash/hello$(EXEXT)		hash/generic_sum$(EXEXT)	\
 					pkey/dh_client$(EXEXT)		\
@@ -86,10 +86,6 @@ all: $(APPS)
 $(DEP):
 	$(MAKE) -C ../library
 
-aes/aescrypt2$(EXEXT): aes/aescrypt2.c $(DEP)
-	echo "  CC    aes/aescrypt2.c"
-	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) aes/aescrypt2.c    $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
-
 aes/crypt_and_hash$(EXEXT): aes/crypt_and_hash.c $(DEP)
 	echo "  CC    aes/crypt_and_hash.c"
 	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) aes/crypt_and_hash.c $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@

programs/aes/CMakeLists.txt

@@ -1,9 +1,6 @@
-add_executable(aescrypt2 aescrypt2.c)
-target_link_libraries(aescrypt2 mbedtls)
-
 add_executable(crypt_and_hash crypt_and_hash.c)
 target_link_libraries(crypt_and_hash mbedtls)
 
-install(TARGETS aescrypt2 crypt_and_hash
+install(TARGETS crypt_and_hash
         DESTINATION "bin"
         PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)