maint: Do not check for optional guile-zstd in configure.ac.v1.5.0

Partially reverts e642300195dfc7c83283db7e103fabf2c6ac65a7.
Only semver is a required dependency, zstd is optional.

* configure.ac: Remove check for Guile-zstd being available.

Change-Id: I1fe0fe77d0f15b1d383c890b46ce678402054efc

1 files changed, 0 insertions, 6 deletions

diff --git a/configure.ac b/configure.ac
index 583842c7072..80d8e025b83 100644
--- a/configure.ac
+++ b/configure.ac
@@ -198,12 +198,6 @@ if test "x$have_guile_lzlib" != "xyes"; then
   AC_MSG_ERROR([Guile-lzlib is missing; please install it.])
 fi
 
-dnl Check for Guile-zstd.
-GUILE_MODULE_AVAILABLE([have_guile_zstd], [(zstd)])
-if test "x$have_guile_zstd" != "xyes"; then
-  AC_MSG_ERROR([Guile-zstd is missing; please install it.])
-fi
-
 dnl Check for Guile-semver.
 GUILE_MODULE_AVAILABLE([have_guile_semver], [(semver)])
 if test "x$have_guile_semver" != "xyes"; then