Revert "Add Connector API (#2531)" (#2553)

Author: pquentin

docs/sphinx/api.rst

@@ -21,7 +21,6 @@ arguments are required for all calls.
    api/cat
    api/ccr
    api/cluster
-   api/connector
    api/dangling-indices
    api/enrich-policies
    api/eql

docs/sphinx/api/connector.rst

@@ -46,7 +46,6 @@
 from .cat import CatClient
 from .ccr import CcrClient
 from .cluster import ClusterClient
-from .connector import ConnectorClient
 from .dangling_indices import DanglingIndicesClient
 from .enrich import EnrichClient
 from .eql import EqlClient
@@ -434,7 +433,6 @@ def __init__(
         self.autoscaling = AutoscalingClient(self)
         self.cat = CatClient(self)
         self.cluster = ClusterClient(self)
-        self.connector = ConnectorClient(self)
         self.fleet = FleetClient(self)
         self.features = FeaturesClient(self)
         self.indices = IndicesClient(self)