Remove debugging output

aclocal.m4

@@ -1811,7 +1811,6 @@ AC_MSG_NOTICE(Building in-tree ghc-pwd)
     changequote(, )dnl
     GHC_LDFLAGS=`echo $LDFLAGS | sed 's/\(^\| \)\([^ ]\)/\1-optl\2/g'`
     changequote([, ])dnl
-    echo $GHC_LDFLAGS
     if ! "$WithGhc" $GHC_LDFLAGS -v0 -no-user-$GHC_PACKAGE_DB_FLAG -hidir utils/ghc-pwd/dist-boot -odir utils/ghc-pwd/dist-boot -stubdir utils/ghc-pwd/dist-boot --make utils/ghc-pwd/Main.hs -o utils/ghc-pwd/dist-boot/ghc-pwd
     then
         AC_MSG_ERROR([Building ghc-pwd failed])