bot: mergify deprected the strict merge option

The strict merge option was not being used and anyway
has been depcrecated by the mergify bot.

Signed-off-by: Travis Nielsen <tnielsen@redhat.com>

.mergify.yml

@@ -46,7 +46,6 @@ pull_request_rules:
     actions:
       merge:
         method: merge
-        strict: false
       dismiss_reviews: {}
       delete_head_branch: {}
 
@@ -64,7 +63,6 @@ pull_request_rules:
     actions:
       merge:
         method: merge
-        strict: false
       dismiss_reviews: {}
       delete_head_branch: {}
 
@@ -98,7 +96,6 @@ pull_request_rules:
     actions:
       merge:
         method: merge
-        strict: false
       dismiss_reviews: {}
       delete_head_branch: {}
 
@@ -132,7 +129,6 @@ pull_request_rules:
     actions:
       merge:
         method: merge
-        strict: false
       dismiss_reviews: {}
       delete_head_branch: {}
 
@@ -170,7 +166,6 @@ pull_request_rules:
     actions:
       merge:
         method: merge
-        strict: false
       dismiss_reviews: {}
       delete_head_branch: {}