Azure: Remove unused location in platform

lisa/sut_orchestrator/azure/platform_.py

@@ -298,7 +298,6 @@ class AzurePlatformSchema:
         ),
     )
     vm_tags: Optional[Dict[str, Any]] = field(default=None)
-    locations: Optional[Union[str, List[str]]] = field(default=None)
     use_public_address: bool = field(default=True)
 
     virtual_network_resource_group: str = field(default="")
@@ -366,9 +365,6 @@ class AzurePlatformSchema:
                     "should be specified either both or not."
                 )
 
-        if not self.locations:
-            self.locations = LOCATIONS
-
     @property
     def cloud(self) -> Cloud:
         # this is a safe guard and prevent mypy error on typing