Merge pull request #1544 from yahonda/diag_default_tablespace_for

Remove `OracleEnhancedAdapter.default_tablespaces[native_database_typ…

Author: yahonda

lib/active_record/connection_adapters/oracle_enhanced/schema_creation.rb

@@ -42,8 +42,7 @@ def visit_TableDefinition(o)
           end
 
           def default_tablespace_for(type)
-            (ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter.default_tablespaces[type] ||
-             ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter.default_tablespaces[native_database_types[type][:name]]) rescue nil
+            OracleEnhancedAdapter.default_tablespaces[type]
           end
 
           def add_column_options!(sql, options)