Remove support of relation type=associatedStreet, few valuable data, most false positive (#841)

Thank you @frodrigo for PR.

layers/building/mapping.yaml

@@ -67,98 +67,6 @@ tables:
         man_made: ["bridge"]
     type: polygon
 
-  # etldoc: imposm3 -> osm_building_associatedstreet
-  building_associatedstreet:
-    columns:
-    - name: osm_id
-      type: id
-    - name: geometry
-      type: validated_geometry
-    - name: area
-      type: area
-    - name: building
-      key: building
-      type: string
-      from_member: true
-    - name: material
-      key: building:material
-      type: string
-    - name: colour
-      key: building:colour
-      type: string
-    - name: buildingpart
-      key: building:part
-      type: string
-      from_member: true
-    - name: buildingheight
-      key: building:height
-      type: string
-      from_member: true
-    - name: height
-      key: height
-      type: string
-      from_member: true
-    - name: buildingmin_height
-      key: building:min_height
-      type: string
-      from_member: true
-    - name: min_height
-      key: min_height
-      type: string
-      from_member: true
-    - name: buildinglevels
-      key: building:levels
-      type: string
-      from_member: true
-    - name: levels
-      key: levels
-      type: string
-      from_member: true
-    - name: buildingmin_level
-      key: building:min_level
-      type: string
-      from_member: true
-    - name: min_level
-      key: min_level
-      type: string
-      from_member: true
-    - name: relbuildingheight
-      key: building:height
-      type: string
-    - name: relheight
-      key: height
-      type: string
-    - name: relbuildingmin_height
-      key: building:min_height
-      type: string
-    - name: relmin_height
-      key: min_height
-      type: string
-    - name: relbuildinglevels
-      key: building:levels
-      type: string
-    - name: rellevels
-      key: levels
-      type: string
-    - name: relbuildingmin_level
-      key: building:min_level
-      type: string
-    - name: relmin_level
-      key: min_level
-      type: string
-    - name: member
-      type: member_id
-    - name: index
-      type: member_index
-    - name: role
-      type: member_role
-      from_member: true
-    - name: type
-      type: member_type
-    mapping:
-      type: [associatedStreet]
-    type: relation_member
-
   # etldoc: imposm3 -> osm_building_relation
   building_relation:
     columns: