Remove num_string_docs references

COUCHDB-2787
diff --git a/test/06-basic-text-test.py b/test/06-basic-text-test.py
index 8ed09f9..493befc 100644
--- a/test/06-basic-text-test.py
+++ b/test/06-basic-text-test.py
@@ -15,7 +15,6 @@
 import unittest
 import user_docs
 import math
-import num_string_docs
 from hypothesis import given, assume, example
 import hypothesis.strategies as st
 
diff --git a/test/mango.py b/test/mango.py
index 0487557..5ca8367 100644
--- a/test/mango.py
+++ b/test/mango.py
@@ -21,7 +21,6 @@
 import friend_docs
 import user_docs
 import limit_docs
-import num_string_docs
 
 
 def random_db_name():
@@ -242,11 +241,3 @@
         super(LimitDocsTextTests, klass).setUpClass()
         if has_text_service():
             limit_docs.setup(klass.db, index_type="text")
-
-class NumStringDocsTextTests(DbPerClass):
-
-    @classmethod
-    def setUpClass(klass):
-        super(NumStringDocsTextTests, klass).setUpClass()
-        if has_text_service():
-            num_string_docs.setup(klass.db, index_type="text")