Remove MetricProcessor from the SDK spec (for now) (#1840)

* Remove MetricProcessor from the SDK spec (for now)

* fix typo

* fix links

* Update specification/metrics/sdk.md

Co-authored-by: Cijo Thomas <[email protected]>

Co-authored-by: Cijo Thomas <[email protected]>
Co-authored-by: Joshua MacDonald <[email protected]>

Author: 3 people

specification/metrics/sdk.md

@@ -25,7 +25,6 @@ Table of Contents
 * [MeterProvider](#meterprovider)
 * [Attribute Limits](#attribute-limits)
 * [MeasurementProcessor](#measurementprocessor)
-* [MetricProcessor](#metricprocessor)
 * [MetricExporter](#metricexporter)
   * [Push Metric Exporter](#push-metric-exporter)
   * [Pull Metric Exporter](#pull-metric-exporter)
@@ -44,13 +43,13 @@ to create an
 instance which is stored on the created `Meter`.
 
 Configuration (i.e., [MeasurementProcessors](#measurementprocessor),
-[MetricProcessors](#metricprocessor), [MetricExporters](#metricexporter) and
-[`Views`](#view)) MUST be managed solely by the `MeterProvider` and the SDK MUST
-provide a way to configure all options that are implemented by the SDK. This MAY be done at the
-time of MeterProvider creation if appropriate.
+[MetricExporters](#metricexporter) and [`Views`](#view)) MUST be managed solely
+by the `MeterProvider` and the SDK MUST provide a way to configure all options
+that are implemented by the SDK. This MAY be done at the time of MeterProvider
+creation if appropriate.
 
 The `MeterProvider` MAY provide methods to update the configuration. If
-configuration is updated (e.g., adding a `MetricProcessor`), the updated
+configuration is updated (e.g., adding a `MeasurementProcessor`), the updated
 configuration MUST also apply to all already returned `Meters` (i.e. it MUST NOT
 matter whether a `Meter` was obtained from the `MeterProvider` before or after
 the configuration change). Note: Implementation-wise, this could mean that
@@ -256,31 +255,6 @@ active span](../trace/api.md#context-interaction)).
 +------------------+
 ```
 
-## MetricProcessor
-
-`MetricProcessor` is an interface which allows hooks for [pre-aggregated metrics
-data](./datamodel.md#timeseries-model).
-
-Built-in metric processors are responsible for batching and conversion of
-metrics data to exportable representation and passing batches to exporters.
-
-The following diagram shows `MetricProcessor`'s relationship to other components
-in the SDK:
-
-```text
-+-----------------+            +-----------------+            +-----------------------+
-|                 | Metrics... |                 | Metrics... |                       |
-| In-memory state +------------> MetricProcessor +------------> MetricExporter (push) +--> Another process
-|                 |            |                 |            |                       |
-+-----------------+            +-----------------+            +-----------------------+
-
-+-----------------+            +-----------------+            +-----------------------+
-|                 | Metrics... |                 | Metrics... |                       |
-| In-memory state +------------> MetricProcessor +------------> MetricExporter (pull) +--> Another process (scraper)
-|                 |            |                 |            |                       |
-+-----------------+            +-----------------+            +-----------------------+
-```
-
 ## MetricExporter
 
 `MetricExporter` defines the interface that protocol-specific exporters MUST
@@ -291,6 +265,23 @@ The goal of the interface is to minimize burden of implementation for
 protocol-dependent telemetry exporters. The protocol exporter is expected to be
 primarily a simple telemetry data encoder and transmitter.
 
+The following diagram shows `MetricExporter`'s relationship to other components
+in the SDK:
+
+```text
++-----------------+            +-----------------------+
+|                 | Metrics... |                       |
+| In-memory state +------------> MetricExporter (push) +--> Another process
+|                 |            |                       |
++-----------------+            +-----------------------+
+
++-----------------+            +-----------------------+
+|                 | Metrics... |                       |
+| In-memory state +------------> MetricExporter (pull) +--> Another process (scraper)
+|                 |            |                       |
++-----------------+            +-----------------------+
+```
+
 Metric Exporter has access to the [pre-aggregated metrics
 data](./datamodel.md#timeseries-model).