Remove AES CBC mode since it's not used by SRTP and libsrtp shouldn't be used as a general purpose crypto library.
diff --git a/configure b/configure
index b37bc4f..4c4330b 100755
--- a/configure
+++ b/configure
@@ -4984,7 +4984,7 @@
    USE_OPENSSL=1
 
 else
-   AES_ICM_OBJS="crypto/cipher/aes_icm.o crypto/cipher/aes.o crypto/cipher/aes_cbc.o"
+   AES_ICM_OBJS="crypto/cipher/aes_icm.o crypto/cipher/aes.o"
    { $as_echo "$as_me:${as_lineno-$LINENO}: checking which random device to use" >&5
 $as_echo_n "checking which random device to use... " >&6; }
    if test "$enable_kernel_linux" = "yes"; then