Remove unused LIBCURL_CPPFLAGS variable which should help cgminer compile on other platforms.
diff --git a/Makefile.am b/Makefile.am
index a88fe84..ee007c6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -29,7 +29,7 @@ cgminer_SOURCES = elist.h miner.h compat.h bench_block.h \
cgminer_LDFLAGS = $(PTHREAD_FLAGS)
cgminer_LDADD = @LIBCURL_LIBS@ @JANSSON_LIBS@ @PTHREAD_LIBS@ @OPENCL_LIBS@ @NCURSES_LIBS@ @PDCURSES_LIBS@ @WS2_LIBS@ lib/libgnu.a ccan/libccan.a
-cgminer_CPPFLAGS = @LIBCURL_CPPFLAGS@ -I$(top_builddir)/lib -I$(top_srcdir)/lib
+cgminer_CPPFLAGS = -I$(top_builddir)/lib -I$(top_srcdir)/lib
if HAVE_x86_64
if HAS_YASM
diff --git a/configure.ac b/configure.ac
index c234adf..1e28fec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -191,7 +191,6 @@ PKG_PROG_PKG_CONFIG()
PKG_CHECK_MODULES([LIBCURL], [libcurl >= 7.15.6], [AC_DEFINE([CURL_HAS_SOCKOPT], [1], [Defined if version of curl supports sockopts.])],
[PKG_CHECK_MODULES([LIBCURL], [libcurl >= 7.10.1], ,[AC_MSG_ERROR([Missing required libcurl dev >= 7.10.1])])])
-AC_SUBST(LIBCURL_CPPFLAGS)
AC_SUBST(LIBCURL_LIBS)
dnl CCAN wants to know a lot of vars.