editing wiki data

removed boilerplace from beginning of file

docs/data/source/internal_data_formats/wiki_data.rst

@@ -9,62 +9,6 @@ Conventions to keep in mind:
 * edX currently uses an external application called Django Wiki for Wiki functionality within courses. 
 
 
-All of our tables will be described below, first in summary form with field types and constraints, and then with a detailed explanation of each field. For those not familiar with the MySQL schema terminology in the table summaries:
-
-`Type`
-  This is the kind of data it is, along with the size of the field. When a numeric field has a length specified, it just means that's how many digits we want displayed -- it has no affect on the number of bytes used.
-
-  .. list-table::
-     :widths: 10 80
-     :header-rows: 1
-
-     * - Value
-       - Meaning
-     * - `int`
-       - 4 byte integer.
-     * - `smallint`
-       - 2 byte integer, sometimes used for enumerated values.
-     * - `tinyint`
-       - 1 byte integer, but usually just used to indicate a boolean field with 0 = False and 1 = True.
-     * - `varchar`
-       - String, typically short and indexable. The length is the number of chars, not bytes (so unicode friendly).
-     * - `longtext`
-       - A long block of text, usually not indexed.
-     * - `date`
-       - Date
-     * - `datetime`
-       - Datetime in UTC, precision in seconds.
-
-`Null`
-
-  .. list-table::
-     :widths: 10 80
-     :header-rows: 1
-
-     * - Value
-       - Meaning
-     * - `YES`
-       - `NULL` values are allowed
-     * - `NO`
-       - `NULL` values are not allowed
-
-  .. note::
-     Django often just places blank strings instead of NULL when it wants to indicate a text value is optional. This is used more meaningful for numeric and date fields.
-
-`Key`
-  .. list-table::
-     :widths: 10 80
-     :header-rows: 1
-
-     * - Value
-       - Meaning
-     * - `PRI`
-       - Primary key for the table, usually named `id`, unique
-     * - `UNI`
-       - Unique
-     * - `MUL`
-       - Indexed for fast lookup, but the same value can appear multiple times. A Unique index that allows `NULL` can also show up as `MUL`.
-
 
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