Remove opus_enc and opus_dec from the build

src/Makefile.am

@@ -8,13 +8,8 @@ noinst_HEADERS = opus_decoder.h opus_encoder.h
 
 pkginclude_HEADERS = opus.h
 
-noinst_PROGRAMS = test_opus opus_enc opus_dec
+noinst_PROGRAMS = test_opus
 
 test_opus_SOURCES = test_opus.c
 test_opus_LDADD = libietfcodec.la $(top_builddir)/celt/libcelt/libcelt0.la $(top_builddir)/silk/libSKP_SILK_SDK.la
 
-opus_enc_SOURCES = opus_enc.c
-opus_enc_LDADD = libietfcodec.la $(top_builddir)/celt/libcelt/libcelt0.la $(top_builddir)/silk/libSKP_SILK_SDK.la
-
-opus_dec_SOURCES = opus_dec.c
-opus_dec_LDADD = libietfcodec.la $(top_builddir)/celt/libcelt/libcelt0.la $(top_builddir)/silk/libSKP_SILK_SDK.la