remove non-normative, confusing remark

Author: pellared

specification/logs/sdk.md

@@ -194,9 +194,7 @@ It consists of the following parameters:
 
   The value of `disabled` MUST be used to resolve whether a `Logger`
   is [Enabled](./api.md#enabled). If `disabled` is `true`, `Enabled`
-  returns `false`. If `disabled` is `false`, `Enabled` returns `true`. It is not
-  necessary for implementations to ensure that changes to `disabled` are
-  immediately visible to callers of `Enabled`.
+  returns `false`. If `disabled` is `false`, `Enabled` returns `true`.
 
 ### Emit a LogRecord
 

specification/metrics/sdk.md

@@ -1011,9 +1011,6 @@ Note: If a user makes no configuration changes, `Enabled` returns `true` since b
 default `MeterConfig.disabled=false` and instruments use the default
 aggregation when no matching views match the instrument.
 
-It is not necessary for implementations to ensure that changes
-to `MeterConfig.disabled` are immediately visible to callers of `Enabled`.
-
 ## Attribute limits
 
 **Status**: [Stable](../document-status.md)

specification/trace/sdk.md

@@ -207,9 +207,7 @@ It consists of the following parameters:
 
   The value of `disabled` MUST be used to resolve whether a `Tracer`
   is [Enabled](./api.md#enabled). If `disabled` is `true`, `Enabled`
-  returns `false`. If `disabled` is `false`, `Enabled` returns `true`. It is not
-  necessary for implementations to ensure that changes to `disabled` are
-  immediately visible to callers of `Enabled`.
+  returns `false`. If `disabled` is `false`, `Enabled` returns `true`.
 
 ### Enabled