docs: Remove patch() from cookbook

docs/cookbook/create.rst

@@ -145,8 +145,6 @@ Use the `agate-sql <https://agate-sql.readthedocs.org/>`_ extension.
 
     import agatesql
 
-    agatesql.patch()
-
     table = agate.Table.from_sql('postgresql:///database', 'input_table')
 
 From an Excel spreadsheet
@@ -158,8 +156,6 @@ Use the `agate-excel <https://agate-excel.readthedocs.org/>`_ extension. It supp
 
     import agateexcel
 
-    agateexcel.patch()
-
     table = agate.Table.from_xls('test.xls', sheet='data')
 
     table2 = agate.Table.from_xlsx('test.xlsx', sheet='data')
@@ -173,8 +169,6 @@ DBF is the file format used to hold tabular data for ArcGIS shapefiles. `agate-d
 
     import agatedbf
 
-    agatedbf.patch()
-
     table = agate.Table.from_dbf('test.dbf')
 
 From a remote file
@@ -187,8 +181,6 @@ Use the `agate-remote <https://agate-remote.readthedocs.org/>`_ extension.
 
     import agateremote
 
-    agateremote.patch()
-
     table = agate.Table.from_url('https://raw.githubusercontent.com/wireservice/agate/master/examples/test.csv')
 
 agate-remote also let’s you create an Archive, which is a reference to a group of tables with a known path structure.

docs/cookbook/lookup.rst

@@ -33,8 +33,6 @@ We can map the ``year`` column to its annual CPI index in one lookup call.
 
     import agatelookup
 
-    agatelookup.patch()
-
     join_year_cpi = table.lookup('year', 'cpi')
 
 The return table will have now have a new column:

docs/cookbook/statistics.rst

@@ -92,8 +92,6 @@ The `agate-stats <https://agate-stats.rtfd.org/>`_ extension adds methods for fi
 
     import agatestats
 
-    agatestats.patch()
-
     outliers = table.stdev_outliers('salary', deviations=3, reject=False)
 
 By specifying :code:`reject=True` you can instead return a table including only those values **not** identified as outliers.