updated readme to include remove command

Author: Craigspaz

README.rst

@@ -21,6 +21,7 @@ Synopsis
     git secrets --add-provider [--global] <command> [arguments...]
     git secrets --register-aws [--global]
     git secrets --aws-provider [<credentials-file>]
+    git secrets --remove [-d|--deleteallowed] [-u|--deleteliteral] [--global] <pattern>
 
 
 Description
@@ -181,6 +182,9 @@ Each of these options must appear first on the command line.
     Secret provider that outputs credentials found in an INI file. You can
     optionally provide the path to an INI file.
 
+``--remove``
+    Removes a pattern or literal added as allowed or prohibited
+
 
 Options for ``--install``
 ~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -389,6 +393,41 @@ Cats secrets out of a file::
 
     git secrets --add-provider -- cat /path/to/secret/file/patterns
 
+Options for ``--remove``
+~~~~~~~~~~~~~~~~~~~~~
+
+``--global``
+    Adds patterns to the global git config
+
+``-u, --deleteliteral``
+    Removes a literal pattern added with the --add command.
+
+``-d, --deleteallowed``
+    Deletes an allowed pattern
+
+``<pattern>``
+    The regex pattern to search.
+
+
+Examples
+^^^^^^^^
+
+Removes a prohibited pattern to the current repo::
+
+    git secrets --remove '[A-Z0-9]{20}'
+
+Removes a prohibited pattern to the global git config::
+
+    git secrets --remove --global '[A-Z0-9]{20}'
+
+Removes a string that is scanned for literally (``+`` is escaped)::
+
+    git secrets --remove --deleteliteral 'foo+bar'
+
+Removes an allowed pattern::
+
+    git secrets --remove -d 'allowed pattern'
+
 
 Defining prohibited patterns
 ----------------------------