meta-phosphor: ipmi-fru: remove libmapper dep

ipmi-fru-parser no longer relies on libmapper in code, so remove
the build dependency as well.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: If3c9f65638a02a19ad584ef669c7c9f353ab77eb
diff --git a/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru_git.bb b/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru_git.bb
index 0e68e96..4bf34d8 100644
--- a/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru_git.bb
+++ b/meta-phosphor/recipes-phosphor/ipmi/phosphor-ipmi-fru_git.bb
@@ -8,7 +8,6 @@
         ${PYTHON_PN}-mako-native \
         ${PYTHON_PN}-pyyaml-native \
         phosphor-ipmi-host \
-        libmapper \
         autoconf-archive-native \
         phosphor-logging \
         cli11 \