feat(otelcol)!: Remove unsupported labels attribute from gcp block

Author: armsnyder

docs/sources/reference/components/otelcol/otelcol.processor.resourcedetection.md

@@ -522,12 +522,6 @@ Use the `gcp` detector regardless of the GCP platform {{< param "PRODUCT_NAME" >
 [Google Cloud Client Libraries for Go]: https://github.com/googleapis/google-cloud-go
 [GCP metadata server]: https://cloud.google.com/compute/docs/storing-retrieving-metadata
 
-The `gcp` block supports the following attributes:
-
-| Attribute | Type           | Description                                                                                   | Default | Required |
-|-----------|----------------|-----------------------------------------------------------------------------------------------|---------|----------|
-| `labels`  | `list(string)` | A list of regular expressions to match GCE instance label keys to add as resource attributes. | `[]`    | no       |
-
 The `gcp` block supports the following blocks:
 
 | Block                                              | Description                                  | Required |

internal/component/otelcol/processor/resourcedetection/internal/gcp/config.go

@@ -8,9 +8,6 @@ import (
 const Name = "gcp"
 
 type Config struct {
-	// Labels is a list of regex's to match GCE instance label keys that users want
-	// to add as resource attributes to processed data.
-	Labels             []string                 `alloy:"labels,attr,optional"`
 	ResourceAttributes ResourceAttributesConfig `alloy:"resource_attributes,block,optional"`
 }
 
@@ -49,7 +46,6 @@ func (args *Config) SetToDefault() {
 
 func (args Config) Convert() map[string]any {
 	return map[string]any{
-		"labels":              args.Labels,
 		"resource_attributes": args.ResourceAttributes.Convert(),
 	}
 }