weed out unnecessary components

Several components are carried by modules lower in the stack now
(shared-userspace, common-build-dependencies, base-runtime).

postgresql.yaml

@@ -38,23 +38,12 @@ data:
   filter: {}
   components:
     rpms:
+      # part of base-runtime:
+      # gettext
       # part of common-build-dependencies:
-      # multilib-rpm-config, gettext
-      # part of common-build-dependencies-bootstrap:
-      # autoconf(uuid)
+      # autoconf(uuid), multilib-rpm-config
       # part of shared-userspace:
-      # python2
-      docbook-dtds:
-        rationale: >-
-          Build dependency (for docbook-utils),
-          runtime dependency (for docbook-style-dsssl)
-        ref: f26
-      docbook-style-dsssl:
-        rationale: 'Build dependency (for docbook-utils)'
-        ref: f26
-      libxslt:
-        rationale: 'Build dependency (for postgresql)'
-        ref: f26
+      # docbook-dtds, docbook-style-dsssl, libxslt, perl-SGMLSpm, python2, tcl
       oniguruma:
         rationale: 'Build dependency (for slang)'
         ref: f26
@@ -64,18 +53,12 @@ data:
       perl-Data-UUID:
         rationale: 'Build dependency (for uuid)'
         ref: f26
-      perl-SGMLSpm:
-        rationale: 'Build dependency (for docbook-utils)'
-        ref: f26
       rsh:
         rationale: 'Build dependency (for lynx)'
         ref: f26
       telnet:
         rationale: 'Build dependency (for lynx)'
         ref: f26
-      tcl:
-        rationale: 'Build dependency (for postgresql)'
-        ref: f26
       openjade:
         buildorder: 1
         rationale: 'Build dependency (for docbook-utils)'