Revert capacity_scaler back to O+C (#140)

Signed-off-by: Modular Magician <magic-modules@google.com>

Co-authored-by: Ty Larrabee <tysen@google.com>

plugins/modules/gcp_compute_region_backend_service.py

@@ -71,7 +71,6 @@ options:
         - A setting of 0 means the group is completely drained, offering 0% of its
           available Capacity. Valid range is [0.0,1.0].
         required: false
-        default: '1.0'
         type: str
       description:
         description:
@@ -519,7 +518,7 @@ def main():
                 elements='dict',
                 options=dict(
                     balancing_mode=dict(default='CONNECTION', type='str'),
-                    capacity_scaler=dict(default=1.0, type='str'),
+                    capacity_scaler=dict(type='str'),
                     description=dict(type='str'),
                     group=dict(required=True, type='str'),
                     max_connections=dict(type='int'),