Remove deprecated methods (#1066)

Author: aidanharan

lib/active_record/connection_adapters/sqlserver/database_limits.rb

@@ -8,45 +8,14 @@ def table_alias_length
           128
         end
 
-        def column_name_length
-          128
-        end
-        deprecate :column_name_length
-
         def table_name_length
           128
         end
-        deprecate :table_name_length
 
         def index_name_length
           128
         end
 
-        def columns_per_table
-          1024
-        end
-        deprecate :columns_per_table
-
-        def indexes_per_table
-          999
-        end
-        deprecate :indexes_per_table
-
-        def columns_per_multicolumn_index
-          16
-        end
-        deprecate :columns_per_multicolumn_index
-
-        def sql_query_length
-          65_536 * 4_096
-        end
-        deprecate :sql_query_length
-
-        def joins_per_query
-          256
-        end
-        deprecate :joins_per_query
-
         private
 
         # The max number of binds is 2100, but because sp_executesql takes