docs: remove nonexistent contentTracing methods (#16614)

docs/api/content-tracing.md

@@ -81,48 +81,6 @@ Trace data will be written into `resultFilePath` if it is not empty or into a
 temporary file. The actual file path will be passed to `callback` if it's not
 `null`.
 
-### `contentTracing.startMonitoring(options, callback)`
-
-* `options` Object
-  * `categoryFilter` String
-  * `traceOptions` String
-* `callback` Function
-
-Start monitoring on all processes.
-
-Monitoring begins immediately locally and asynchronously on child processes as
-soon as they receive the `startMonitoring` request.
-
-Once all child processes have acknowledged the `startMonitoring` request the
-`callback` will be called.
-
-### `contentTracing.stopMonitoring(callback)`
-
-* `callback` Function
-
-Stop monitoring on all processes.
-
-Once all child processes have acknowledged the `stopMonitoring` request the
-`callback` is called.
-
-### `contentTracing.captureMonitoringSnapshot(resultFilePath, callback)`
-
-* `resultFilePath` String
-* `callback` Function
-  * `resultFilePath` String
-
-Get the current monitoring traced data.
-
-Child processes typically cache trace data and only rarely flush and send
-trace data back to the main process. This is because it may be an expensive
-operation to send the trace data over IPC and we would like to avoid unneeded
-runtime overhead from tracing. So, to end tracing, we must asynchronously ask
-all child processes to flush any pending trace data.
-
-Once all child processes have acknowledged the `captureMonitoringSnapshot`
-request the `callback` will be called with a file that contains the traced data.
-
-
 ### `contentTracing.getTraceBufferUsage(callback)`
 
 * `callback` Function

docs/api/promisification.md

@@ -14,9 +14,6 @@ When a majority of affected functions are migrated, this flag will be enabled by
 - [contentTracing.getCategories(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#getCategories)
 - [contentTracing.startRecording(options, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#startRecording)
 - [contentTracing.stopRecording(resultFilePath, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#stopRecording)
-- [contentTracing.startMonitoring(options, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#startMonitoring)
-- [contentTracing.stopMonitoring(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#stopMonitoring)
-- [contentTracing.captureMonitoringSnapshot(resultFilePath, callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#captureMonitoringSnapshot)
 - [contentTracing.getTraceBufferUsage(callback)](https://github.com/electron/electron/blob/master/docs/api/content-tracing.md#getTraceBufferUsage)
 - [cookies.get(filter, callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#get)
 - [cookies.set(details, callback)](https://github.com/electron/electron/blob/master/docs/api/cookies.md#set)