Removed version gtests from openpower-pnor-code-mgmt

These gtests were moved to phosphor-bmc-code-mgmt in
https://gerrit.openbmc-project.xyz/#/c/3802/
I left the base test code since tests are needed
for other functions in this repo.

Change-Id: Id3f4666550ce04ddec5e34dcfe103cfe0ea42304
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/Makefile.am b/Makefile.am
index 50681c3..f8ef52a 100755
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,8 +24,7 @@
 	$(SYSTEMD_LIBS) \
 	$(PHOSPHOR_DBUS_INTERFACES_LIBS) \
 	$(SDBUSPLUS_LIBS) \
-	$(PHOSPHOR_LOGGING_LIBS) \
-	-lstdc++fs
+	$(PHOSPHOR_LOGGING_LIBS)
 
 openpower_version_host_software_manager_CXXFLAGS = $(generic_cxxflags)
 openpower_version_host_software_manager_LDFLAGS = $(generic_ldflags)