Bug 13131 - remove Solr config file

This file should have been removed as part of Bug 12538.

Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

etc/solr/indexes.yaml

@@ -1,33 +0,0 @@
-ressource_types:
-    - biblio
-    - authority
-
-indexes:
-    - code: title
-      label: Title
-      type: ste
-      ressource_type: biblio
-      sortable: 1
-      mandatory: 1
-      mappings:
-          - 200$a
-          - 210$a
-          - 4..$t
-    - code: author
-      label: Author
-      type: str
-      ressource_type: biblio
-      sortable: 1
-      mandatory: 0
-      mappings:
-          - 700$*
-          - 710$*
-    - code: subject
-      label: Subject
-      type: str
-      ressource_type: biblio
-      sortable: 0
-      mandatory: 0
-      mappings:
-          - 600$a
-          - 601$a