Remove doc packages comments.

doc packages not listed in /data/api/rpms are shipped
as "unsupported" or "implementation details".
See https://pagure.io/modulemd/blob/master/f/spec.yaml

ruby.yaml

@@ -78,12 +78,10 @@ data:
     api:
         # RPMs
         # From *.spec %package
-        # *-doc are filtered.
         rpms:
             # From ruby.spec
             - ruby
             - ruby-devel
-            # - ruby-doc
             - ruby-irb
             - ruby-libs
             - rubygems
@@ -103,22 +101,16 @@ data:
             - rubygem-xmlrpc
             # From rubygem-abrt.spec
             - rubygem-abrt
-            # - rubygem-abrt-doc
             # From rubygem-bundler.spec
             - rubygem-bundler
-            # - rubygem-bundler-doc
             # From rubygem-mysql2.spec
             - rubygem-mysql2
-            # - rubygem-mysql2-doc
             # From rubygem-pg.spec
             - rubygem-pg
-            # - rubygem-pg-doc
             # From rubygem-bson.spec
             - rubygem-bson
-            # - rubygem-bson-doc
             # From rubygem-mongo.spec
             - rubygem-mongo
-            # - rubygem-mongo-doc
     # Add profiles/default as a temporary workflow,
     # because of a issue for omitted profiles element.
     profiles: