drop the SG library completely.

src/runtime/c/Makefile.am

@@ -1,7 +1,7 @@
-lib_LTLIBRARIES = libgu.la libpgf.la libsg.la
+lib_LTLIBRARIES = libgu.la libpgf.la
 
 pkgconfigdir = $(libdir)/pkgconfig
-pkgconfig_DATA = libgu.pc libpgf.pc libsg.pc
+pkgconfig_DATA = libgu.pc libpgf.pc
 
 configincludedir = $(libdir)/libgu/include
 
@@ -37,10 +37,6 @@ pgfinclude_HEADERS = \
 	pgf/pgf.h \
 	pgf/data.h
 
-sgincludedir=$(includedir)/sg
-sginclude_HEADERS = \
-	sg/sg.h
-
 libgu_la_SOURCES = \
 	gu/assert.c \
 	gu/bits.c \
@@ -92,12 +88,6 @@ libpgf_la_SOURCES = \
 libpgf_la_LDFLAGS = -no-undefined
 libpgf_la_LIBADD = libgu.la
 
-libsg_la_SOURCES = \
-	sg/sqlite3Btree.c \
-	sg/sg.c
-libsg_la_LDFLAGS = -no-undefined
-libsg_la_LIBADD = libgu.la libpgf.la
-
 bin_PROGRAMS =
 
 AUTOMAKE_OPTIONS = foreign subdir-objects dist-bzip2
@@ -105,5 +95,4 @@ ACLOCAL_AMFLAGS = -I m4
 
 EXTRA_DIST = \
 	libgu.pc.in \
-	libpgf.pc.in \
-	libsg.pc.in
+	libpgf.pc.in